Natural Cure For Astigmatism
Astigmatism is a common eye disorder that affects your vision. The muscles around your eyes are affected which causes undue stress on the cornea which causes the cornea to lose its shape, which in turn causes blurry vision. Some of the other symptoms of astigmatism include double vision, eyestrain, eye irritation, and headaches.
It can be prevalent at birth or could be a result of trauma, congenital conditions or eye surgery. It can be very annoying as it makes a simple task like reading a book complicated. However, there are several natural ways to treat astigmatism and one of them is eye exercises. Benefits of eye exercises for Astigmatism It’s true that there are eye exercises to treat astigmatism.
Just like the other muscles in our body, our eye muscles also work on a simple logic of keeping them in use them or else you lose them. Therefore, it is important that you keep your eye muscles active throughout the day. Other than by staring straight at the computer screen or at the road ahead while driving doesn’t exercise the muscles to their full potential, additional eye exercises are must.
- Help to reduce the stress.
- Strengthen the eyes and relaxes the eye muscles.
- Improve vision over time or in between 1 to 4 weeks.
Six eye exercises you can do at home to treat astigmatism
- Rectus muscle relaxation It relaxes the rectus muscles and can be done in the following steps
- Place your thumb just above the nose, move it clockwise and leave it there for 2-3 seconds.
- Move your thumb back to the original position. Now, move it to 1 o’clock position, then to 3,5, so on and back to 12. You can do this exercise 2-4 times per day.
- Don’t forget to breathe while you are moving the thumb from the center out and slowly exhale to relax your muscles.
2. Eye Massage This exercise restores the shape of the cornea
- Close your eyes and keep your two fingers on each of your eyelids.
- By applying gentle pressure, slowly move your fingers in a circular motion from top to bottom and right to left.
- Move your fingers clockwise as well as anti-clockwise and repeat it for 10–15 times, 2 to 4 times a day.
3. Reading It helps to release the strain and pressure caused by astigmatism.
- Pull out a book.
- Place an object on the side. Focus on the side object after reading a paragraph from the book.
- It is advised to continue this until your eyes start to feel tired, 2-4 times a day.
4. Vision Breaks It relieves eye pressure and strain.
- Take a short break from writing, reading, or staring at the computer.
- Focus for 20 seconds on other objects that are kept in the distance
- Repeat the exercise as many times as possible in a day.
5. Head Tilting It helps the extraocular muscles to regulate the force they exert on the eyeball.
- After looking in the mirror, find out if you tilt your head to one side.
- Spend time every day to tilt your head in the opposite direction.
6. Eye Yoga It strengthens eye muscles, sharpens focus and improves vision.
- Stand, sit in the chair or on the floor and keep your posture straight.
- Close your eyes and breathe while concentrating.
- Slowly and start moving your eyeballs from side to side.
- Do this exercise several times a day.
Daily performing these exercises will reduce the symptoms and eventually treat astigmatism. But make sure to consult your eye doctor to find out if these exercises will work for you. See Also: Exercise benefits your eyes
- 1 What causes astigmatism to worsen?
- 2 Can stress cause astigmatism?
- 3 How do I stop my astigmatism?
Can astigmatism be cured without surgery?
Corrective lenses – Wearing corrective lenses treats astigmatism by counteracting uneven curvatures of your cornea or lens. Types of corrective lenses include:
Eyeglasses. Eyeglasses are made with lenses that help compensate for the uneven shape of the eye. The lenses make the light bend into the eye properly. Eyeglasses can also correct for other refractive errors, such as nearsightedness or farsightedness. Contact lenses. Like eyeglasses, contact lenses can correct most astigmatism. They are available in a variety of types and styles. Contact lenses are also used in a procedure called orthokeratology. In orthokeratology, rigid contact lenses are worn during the night while sleeping until the curvature of the eye evens out. Then the lenses are worn less frequently to maintain the new shape. If treatment is discontinued, the eye returns to its former shape and refractive error. Wearing contact lenses for extended periods of time increases the risk of infection in the eye. Ask your eye doctor about the pros and cons and risks of contact lenses and what might be best for you.
Can vitamin deficiency cause astigmatism?
Discussion – The predictable presence of two findings is readily found in a chronically vitamin D deficient patient using the Oculus GmbH Pentacam. The first is a central, disc-like region of faint corneal stromal haze, an example of which is shown in Figure 10,
- This haze is generally not well visualized at the slit lamp, though in the most prominent cases (typically in elderly individuals), it can be discerned with indirect illumination.
- Cross-sectional imaging by the Pentacam suggests it extends through the full thickness of the corneal stroma in a relatively uniform fashion.
The haze clears progressively with D3 supplementation. Typical Low D3 Nebula Common finding of a central nebula with chronic low D3, which resolves with adequate supplementation. The second finding is irregular astigmatism, which tends to take one of three predictable forms, all of which represent deformation effects upon the mechanics of an arch.
In the most common version, mostly seen in corneas under 560 um center thickness, a “tear-drop” pattern of relative inferior steepening forms. This is consistent with a direct depression of the superior cornea via the weight and elastic compression exerted by the upper eyelid, depicted in Figure 11A,
This superior depression (which the Pentacam can quantitate and compare in contrast to an idealized model) drives a compensating elevation below the center, creating a wave of asymmetry across the visual axis for which there is no regular optical solution.
- In addition, the usually “almond-shaped” arched configuration of the upper eyelid leads to a disproportionate vector of this force being exerted inferonasally in the majority of people.
- This is seen in extreme cases with the pronounced inferonasal steep displacement characteristic of keratoconus.
- Opposing these upper lid compressive forces are globe/corneal mechanical properties: elasticity, “dome mechanics” with respect to the distribution of applied forces, thickness and also the intraocular pressure, all of which would otherwise contribute to forming an ideal aspheric shape (given the normal corneal thickness tapering toward its axial apex).
In keeping, variations in local corneal thickness, pathology (scars, pterygia, dehydration and Dellen formation), alteration of elasticity/compliance (keratotomy effects, cross-linking, etc.), upper eyelid position (ptosis, retraction) and lid thickness and weight (chalazia, chronic blepharitis, hemangioma, dermatochalasis, etc.) are seen to impact and alter corneal shape disturbance in predictable ways.
A second deformation pattern is more common in corneas thicker than 560 um. This pattern shows a primary “ripple” immediately below the usual upper eyelid margin’s resting position in primary gaze, just above the superior pupil margin in room light. There is commonly an “echo” of additional diminishing waves inferior to it.
This pattern is illustrated in Figure 11B, The third easily identifiable pattern is pronounced apical flattening as shown in Figure 11C, This is frequently encountered in hyperopic individuals and may stem from the particular effect of Bell’s phenomenon: the underside of the upper eyelid and orbital roof contacting and compressing the up-turned cornea at night. Corneal Mechanical Deformation Patterns Illustration of the three most commonly encountered distortion patterns associated with low D3 and representing variations of the mechanical arch compression response. A) Superior depression by the upper eyelid leading to out-bulging and steepening of the inferior cornea.
- B) Superior depression creating a more immediate “ripple” and wave pattern beneath, often seen in thicker-than-average corneas.
- C) Apical compression with the resulting steepening of the immediate surround, possibly caused by external central compression during Bell’s reflex.
- Adequate D3, amazingly without fail, leads to steady reversal of any of these distortions in 100% of cases observed.
Regions of excessively steep power drop and the low regions rise, producing more uniform optics. Irregular astigmatism reduces first but, generally, the regular component begins to decrease as well. Curiously, if at any age there is some degree of lenticular/internal astigmatism, the corneal component approaches a 90 degree-opposite counter-balancing value, closing upon a net spherical (non-astigmatic) outcome.
This implies a feedback-driven, self-adjustment capability may remain in effect even later in life. Consistent with limbal stem cell location and peripheral initiation of growth, the changes in shape, mechanical properties and even changes in thickness appear to initiate at the periphery and spread centrally.
These shifts often exhibit properties of a moving wave, generating a trough preceding the wave peak as it converges upon the corneal center. As with a wave entering the shallower water near a beach, the peak steep zone may even rise, focally steepening further, as it moves into successively thinner cornea.
The waveform then “breaks” and dissipates, settling into a more idealized aspheric form. The dramatic speed with which restoration of an optimal serum 25(OH)D3 level achieves objective response suggests improved mechanical properties are initially a physiologic phenomenon as opposed to structural synthesis, although the latter appears to follow later and cement the improvement.
This is given weight by the enhanced effect seen via the addition of a topical corticosteroid. The latter perhaps represents a mineral-corticoid (rather than glucocorticoid) effect, with the resulting shift in the water/salt balance bringing about a rapid alteration in the stromal biomechanics.
- Overall, the improved optics of a vitamin D-replete state appear to result from enhanced corneal mechanical properties reliably yielding an optimized arch/dome “engineering” response.
- The implications regarding D3 influence upon intraocular pressure are highly intriguing.
- Aqueous outflow would logically be impacted by changes in limbal-region mechanical properties, but the control of internal fluid pressure may be implicated in producing some of those same mechanical changes as well.
Pressure changes might thus not be always just a response to shifting mechanical properties of the globe, but may, in fact, be a major agent in creating them. Aqueous pressure exerts a direct effect upon the shape of the cornea and globe as an “inflating” force, but it also has a hydrostatic impact upon these structures (mediated by the corneal endothelium, in particular).
- It influences hysteresis and the nature of the mechanical response to those shaping forces.
- This combination is rich with potential for a feedback-driven process.
- Might the intraocular pressure be an instrument for modification and/or stabilization of the eye’s optics? In the pathological state—for instance, pediatric glaucoma—that relationship is overt in its negative consequences, with the more compliant globe delivering dramatic disc cupping and axial elongation, but not necessarily an elevated intraocular pressure measurement.
Seen in this light, glaucoma may represent derangement of a process charged primarily with optical stability and/or adaptation to adverse optical disturbance. The aqueous would go beyond a “fill, remove and replenish” function to act as an instrument for globe modification: actively “inflating/deflating”—albeit very slowly—according to feedback-generated need.
- Under normal circumstances, this would support refining the optical configuration in concert with the elastic properties of the cornea and globe as a whole.
- In pathological states, peril becomes compounded.
- Implications for emmetropization and myopia Given its well-known impact on bone development and connection to sunlight, a role for vitamin D was the logical first choice for explaining the long-observed inverse association between daylight exposure and incidence of myopia.
While that association has remained solid through multiple studies, the role of D3 as the agent of causation has been controversial from early on, due to findings of only small or even no significant differences in the blood levels between myopes and non-myopes,
- Unfortunately, it does not appear any controlled prospective trial has yet been done to assess the impact of effective supplementation, though a non-controlled prospective trial in a small number of patients was reported by Knapp as far back as 1939,
- Population cross-sectional studies do not address the possibility—the likely explanation in the author’s opinion—that most young people are chronically deficient under present-day circumstances, even at lower latitudes and in sunny regions, owing to a multitude of factors (indoor schooling, clothing, lack of substantial vitamin D sources in the diet, pollution, sunblocks, skin pigmentation/tan, etc.), but some are more susceptible to that state than others.
The latter would represent the “hereditary” element of myopia tendency. The findings herein reported suggest rather an indirect response to D3 deficiency-induced corneal distortion actually leads to myopic shift and subsequent progression, ironically due to optically driven feedback mechanisms normally meant to foster emmetropia.
As described, the lack of sufficient vitamin D reliably produces substantial irregular astigmatic states, most of which directly involve the central optical zone. This brings about a situation wherein the eye cannot be adequately in uniform focus under any conditions. Evolving understanding of the process of emmetropization in chicks includes a response weighted according to the spatial ratio of retina receiving myopic versus hyperopic defocus,
All three corneal distortion patterns linked to insufficient vitamin D status described earlier create relative flattening within significant regions of the optical zone—yielding hyperopic defocus—yet also show localized steepening below or immediately adjacent, those regions featuring myopic defocus.
This optical “turbulence” results in a “perfect storm” at that point, with regions of hyperopic defocus alongside regions of myopic defocus. Correction of the latter exacerbates the relative influence of the former—a vicious cycle. In addition, larger pupil size enlarges the area of irregular defocus and longer wavelength illumination will relatively dominate central retinal stimulation, longer wavelength light being less susceptible to deviation via irregular optics than wavelengths at the shorter end of the spectrum.
It has been shown that longitudinal chromatic aberration provides a mechanism for sensing hyperopic vs. myopic defocus via changes in luminance and chromatic contrast, so the resulting dominance of longer wavelength light upon the central retina would all the more drive a “corrective” growth response toward axial lengthening and resultant myopia.
Add to that a common preference for “warmer” lighting indoors—weighted toward the longer wavelengths as well—and it becomes no surprise asymmetrically defocused, growing eyes lean toward axial elongation and myopic outcomes. Eyeglass correction cannot address this imbalance, either, offering a rigidly limited two-dimensional solution to what is very much a three-dimensional problem.
For the most part, soft contact lenses echo corneal distortion to some degree and uniformity of focus will then suffer from the same conflicts. A rigid contact lens might be seen to offer at least a partial solution to this conundrum and relative suppression of myopic progression has been reported accordingly, but their well-known tendency to impose apical flattening and corneal irregularity, as well as their inability to mask refractive aberrations of the inner corneal surface, tear lens and net corneal refractive power frustrate the benefit, also an observed phenomenon,
Applying the understanding of this concept clinically in the herein reported patient population has nearly eradicated return visits for “unhappy refractions” and allowed effective trouble-shooting for second opinions sought for this complaint. Usual refraction technique, in particular, the application of the Jackson cross-cylinder in the determination of cylinder power, appears to innately favor over-correction of the focal elevations of corneal power at the expense of the low regions.
In some cases, a single “clock-hour ” region of the optical zone may be critically in focus on a 20/20 line, while 11 “clock-hours” are over-corrected. It also drives higher-than-necessary cylinder correction, in particular, unless one specifically rounds downward while maintaining spherical equivalence.
Respecting patients’ subjective response to the maneuver, in most cases, will prove they prefer the lower cylinder correction, which corresponds to the majority of the optical zone’s needs, rather than supports a focally steep region of maximum demand. The patient might comment the image isn’t “crisp,” but it proves more comfortable/tolerable/desirable in general use.
This explains the young high school student, who can target a friend with a ball at 50 meters, but complains of difficulty reading the “smart board” in class despite manifesting near-plano refraction. The irregular cylinder component is not picked up fully (or sometimes at all) by manifest refraction: the mix of flat and steep regions along the same meridian cancel one another out to a degree, while still yielding a net loss of resolution.
Lower light and contrast conditions, illuminated targets, pixels on screens and reading, in particular, are much more prone to negative impact from this irregular astigmatic distortion and defocus, due to the near-axial location of the deviations, accommodation-driven pupillary constriction converging further upon them, and probably elements of constructive and destructive optical interference.
Topographers lacking ability to directly assess the central optical zone, including the majority of placido-disc systems long in use, may under-calculate the degree of aberration or even miss its presence entirely. The use of the Oculus Pentacam has proven invaluable in identifying this phenomenon.
- Why the “disc” of central stromal haze forms in the setting of inadequate vitamin D availability is unknown, but it reliably clears with effective supplementation.
- Its localized nature appears to be a physical phenomenon and not just an artifact of the plane of imaging illumination relative to that of the corneal curvature.
Whether there is any connection to “stromal microdots” revealed by in vivo confocal microscopy in many adult corneas and reported prone to increase with age is an interesting question, The ability of the Pentacam to reproducibly quantify the reflectance measurement and follow this parameter objectively as it decreases (or increases in those still vitamin D deficient) has proven helpful in documenting the response to vitamin D replacement and allows correlation of reflectance values directly with clinical symptoms.
- Many individuals will report images lack sharp definition when reflectivity values measure above 20 units in the axial mid-stroma.
- Those in excess of 25 units will frequently complain of glare.
- The latter is particularly evident in older, life-long residents of the Pacific Northwest who have had cataract surgery already.
Their corneas appear within the range of normal clarity at the slit lamp, typically with a well-centered intraocular lens and no capsular concerns. Symptoms otherwise seem incongruous with the exam findings, but make sense in light of the identified haze.
- In some cases, specifically hunting for the haze, it can be appreciated clinically with a brighter, broad slit beam oriented obliquely through the stroma.
- Glaucoma A potential role of vitamin D with regard to glaucoma is not novel, but there has been little definition of that role to date; sporadic literature on the subject spans more than 6 decades,
These new findings can provide synergistic insight, however, into recent work exploring corneal biomechanical properties for differentiating normal from glaucomatous eyes and genetic associations linking central corneal thickness, keratoconus and open-angle glaucoma,
The latter include the already vitamin D-associated FOXO1 locus, The present case data, supporting a direct role in significant improvement of intraocular pressure control with adequate supplementation, taken in concert with the clearly demonstrable structural changes brought about by D3 availability (as well as the suggestion of an additional capability to suppress the “steroid effect” upon intraocular pressure), hopefully will enkindle additional research.
Of note, newly diagnosed glaucoma has largely ceased to present within this patient population under study over the last ten years, a phenomenon otherwise difficult to explain. Dry Eyes The ability to control dry eye symptoms and findings with adequate availability of D3 has proven tremendously beneficial, in particular, with the synergistic application of a topical steroid, ideally non-preserved.
- Topical steroids have long been known to improve dry-eye associated symptoms, findings, and inflammation.
- However, their long-term use is restricted by the risk of adverse effects like cataract formation and intraocular pressure rise.
- In contrast, in the presence of adequate D3, valuable improvement is seen in the great majority of patients with short-term and low dose topical steroid application for which risks are minimal.
In the study population, approximately 80% report total or near-total remission of symptoms (anecdotal). About 20% do not respond as well, reflecting the multi-factorial nature of the condition; however, even those who earlier “failed” topical cyclosporine therapy may achieve relief by trying it again in concert with optimal vitamin D replacement in progress (anecdotal).
- Vitamin D’s possible influence and usefulness in addressing dry eye disease have been previously proposed and vitamin D deficiency has been linked to dry eye disease, but, to date, no specific protocol has been advanced recognizing documented success via controlled prospective studies in humans.
- Topical application of vitamin D formulations for treatment of dry eyes and ocular surface disease was the subject of a series of patents filed by Kita (2000) and Itoh et al (1991-2002), but they only provided limited observations from a small series of animal studies in support of the claims.
More recently, lifitegrast (XiidraTM), a Lymphocyte Function Associated Antigen 1 (LFA-1) binding agent has been introduced for treatment of dry eye. This compound is believed to interfere with the binding of T cells to the Intercellular Adhesion Molecule 1 (ICAM-1) and suppress pro-inflammatory cytokine production involved in the pathogenesis of an ocular surface disease.
Significantly, D3 interacts with both ICAM-1 and LFA-1 to modulate immune function and supplementation may offer a synergistic, augmented or adjunctive benefit in concert. That vitamin D forms show synergy with topical steroids for an ocular surface disease is consistent with the enhanced therapeutic effect already established for psoriasis—another vexing, chronic, and surface-located inflammatory condition—achieved using just such a combination,
The findings in the present study will hopefully fuel even more investigation and perhaps lead to the development of topical steroid-vitamin D analogue preparations with a variety of clinical applications for the eye and other organ systems. If suppression of steroid-response intraocular pressure rise can be consistently demonstrated in follow-up controlled studies, the combination would be all the more encouraging to employ.
- Eratoconus Within this evolving paradigm, keratoconus may be uniquely explained and understood as lying at one extreme of a bell-shaped curve of corneal response to chronically low D3.
- Given the pattern of occurrence and the better response observed to higher supplementation, this previously confounding disease can be reasonably described as the ocular version of “vitamin D-resistant rickets.” This interpretation readily explains the recurrence of keratoconus after corneal grafting, too, since the patient, in all likelihood, remains in the same or even a worsening state of vitamin D deficiency with increasing age.
Remarkably, the ability to achieve improvement and even reverse keratoconus findings utilizing forms of vitamin D supplementation was also previously reported by Knapp in 1938, Lacking the benefit of computerized topography and structural analysis, he meticulously created life-casts of keratoconus-afflicted corneas.
- With the help of the New York University engineering and physics departments providing micrometer measurements, he demonstrated the flattening of the cones in all six of the subjects available for follow-up after six months of increased vitamin D supplementation.
- He was also able to show an overall decrease in corneal height in at least five of the six.
No further progress based upon his findings appears to have been made until now. The re-discovery of keratoconus reversal with adequate D3 reported here was arrived at without any knowledge of Knapp’s work. His publications were uncovered during a subsequent search and review of historical literature.
- For keratoconus, collagen cross-linking techniques have achieved a beneficial degree of stabilization.
- Also, the asymmetric implantation of intrastromal ring-segments may improve the optical properties of keratoconic eyes and impede the structural decline when combined with cross-linking,
- Seen in the light of the vitamin D deficiency-related biomechanical model discussed in this report, the improved outcome with the single segment, asymmetrical, stromal implant placement described by Sharma and Boxer Wachler is readily appreciated, specifically reinforcing the weakened cornea at the location needed to support upper eyelid weight.
By contrast, optical improvement is likewise seen following upper eyelid blepharoplasty, repair of significant ptosis, or in relief of substantial dermatochalasis, via reducing the deformational mass instead of reinforcing the supporting corneal structure that resists it.
Cataracts With regard to cataracts, the demand for surgery in the studied population declined precipitously over the last 10 years, from approximately five cases per month (reflecting a small, solo practice scheduling seven to 10 patients daily) to one every three to four months. Patient demographics did not change over the time period in question and most other ophthalmic practices in our area have experienced a contemporary rise in demand for cataract surgical services (anecdotal), consistent with national trends and the aging of the “Baby Boom” generation.
The only factor known to have changed in the studied population is increasing compliance with recommended D3 supplementation. Nuclear density, rated via Pentacam reflectivity, appears stabilized or even reduced in some (anecdotal). However, the combination of increasing irregular axial corneal astigmatism in the D3 deficient population, when added to concurrent cataract development, readily produces intrusive symptoms.
- Resolving the corneal distortion thus allows the symptoms to diminish to the point of toleration, delaying the need for surgery.
- While not eliminating the eventual need for cataract extraction, a significant delay in the need for surgery could offer benefits on a global scale.
- Macular degeneration A protective role for vitamin D is likewise emerging for macular degeneration,
The observations herein reported offer additional insight, though, into a peculiar phenomenon long observed by the author: near-universal association between macular degeneration and substantial against-the-rule astigmatism. Given that the term “against the rule” (ATR) describes the vertical axis refractive cylinder being less commonly encountered than the horizontal axis “with the rule” astigmatism in the normal population, the curiosity that a great majority of AMD-afflicted individuals exhibit ATR astigmatism—even after otherwise successful cataract surgery should have eliminated any lens/nuclear ATR component—suggests the two conditions are closely linked in some fashion, perhaps by an element of underlying vitamin D deficiency.
The vitamin D deficiency distortion patterns described tend to induce corneal ATR cylinder effects, the full magnitude of which may escape detection without the assistance of accurate topographical assessment. In the setting of significant irregularity, manifest refraction may not even be able to provide full correction, and the resulting acuity discrepancy is then too logically ascribed entirely to the macular disease.
In the studied population, there have been more than a few individuals who regained their ability to read common text or even drive once the corneal shape was improved and the stromal haze reduced with adequate vitamin D supplementation, even though there was no other remarkable change in macular appearance, drusen, or pigment epithelial changes (anecdotal).
- Older individuals are logically at a particularly high risk for vitamin D deficiency, frequently experiencing more limited time outdoors, employing protective strategies against skin cancer, and, in the Pacific Northwest, simply having lived longer in a darker part of the world.
- The commonplace magnesium deficiency resulting from over-farming and soil depletion further compounds the problem.
Serial retinal Optomap (Optos Inc., Dunfermline, Scotland) images from AMD patients adequately supplemented with D3 support the possibility that increased availability may be associated with diminished drusen, stability of pigment epithelial changes, and, possibly, even arrested geographic atrophy (anecdotal).
- These observations await further exploration and confirmation.
- Vitamin D supplementation A critical observation is that beneficial responses are usually only realized when the serum 25(OH)D3 level rises above 50 ng/cc and optimal response begins around 70-80 ng/cc.
- Historically, laboratories referenced a normal range of 30 to 100 ng/cc, so, in that respect, the apparent ideal coincides with the middle of the normal range—ordinarily a desirable thing.
In keeping, levels above 50 ng/cc are found in contemporary populations with significant daily sun exposure, By contrast, in the author’s experience, the majority of inadequately supplemented residents of Western Washington State have 25(OH)D3 levels well below 30 ng/cc.
- A recent study suggests levels under 30 ng/cc are likewise prevalent throughout the USA, even at lower latitudes, with theoretical access to adequate sunshine, reflecting population trends toward predominantly indoor employment and education, sun-protective clothing, sunblocks, air pollution, etc.
- Faced with such a baseline, to achieve serum 25(OH)D3 greater than 50 ng/cc, local experience has been that most adults require vitamin D3 supplementation somewhere between 5,000 and 10,000 IU/day and a small number have needed 15,000 IU/day.
Children have been found to require approximately 1000 IU/25 pounds (ll.3 kilograms) body weight/day. These are substantially above the currently recommended dose of 600-800 IU/day (and the “safe upper limit” of 4000 IU/day) advocated by the Institute of Medicine since 2011 but consistent with recommendations from the Endocrine Society,
- An additional concern is that the responses and improvements described have not yet been observed in the studied population via supplementation by ergocalciferol (vitamin D2), even at very high doses and in prescription formulations.
- Given that ergocalciferol is by far the most common food-additive and fortification analogue of vitamin D, and the most common form available by prescription in the United States, the lack of a response in the cornea—despite proving 100 % predictable in the case of cholecalciferol/D3—raises questions about the physiologic efficacy of vitamin D2 in many regards.
Knapp did report a response to ergocalciferol/D2 in his 1938 keratoconus research, but it was given at an extremely high dose by comparison, up to 50,000 IU daily. Interestingly, in the author’s experience, 5,000 IU/day of cholecalciferol/D3 quickly normalized and stabilized serum calcium levels of a patient with presumed secondary hypoparathyroidism, who had been consistently hypocalcemic for years while taking prescription ergocalciferol at 50,000 IU every other day.
- This phenomenon would likewise benefit from further investigation.
- A major limitation of this report is the challenge of evoking the abundance of topographical data obtained over a decade in a concise form for publication and review.
- While some parameters determined by the Pentacam may lend themselves to a tabular or graphical presentation, the overall consistency of the eye’s response to adequate D3 is best appreciated by a serial evaluation of multiple aspects in concert.
For instance, in some with keratoconus, posterior elevation may show a reduction and average corneal thickness a desirable increase, yet the minimum internal radius may transiently decrease as the inferior displacement of the maximum curvature shifts/restores back toward the corneal axis.
By contrast, in others, the internal radius can increase without an initial change in thickness or a significant change in measured posterior elevation. Both patterns contribute to an optical improvement and represent the reversal of an aspect of disease progression; yet, in combination, the data would, to some extent, mathematically conflict.
The latter can be resolved with adequate numbers and time, such as may be afforded by a controlled trial in a corneal specialty clinic. In addition, there are many potentially confounding variables inherent in uncontrolled observations during clinical practice: compliance, diet, sun exposure, use of sunblocks, dietary presence or absence of cofactors, and coexistent pathophysiology to name just a few.
What causes astigmatism to worsen?
What Causes Astigmatism to Worsen? – Astigmatism frequently worsens with age. Your cornea can become more irregular due to pressure from your eyelids as they lose muscle tone. Astigmatism generally stays stable until your turn 50, After then, your lens curvature progressively worsens each decade.
Can you live with astigmatism without glasses?
You’ll likely need glasses if your astigmatism has a strength of 1.0 or more. But even if your astigmatism needs less than 1.0 diopters of correction, it doesn’t mean you won’t need glasses.
Can stress cause astigmatism?
What Causes Astigmatism? – In most cases, this disorder is inherited, i.e. it is transmitted from one generation to another. In addition, it is as well common in individuals who spend most of their time in front of the computer or participate in some activities such as embroidery which subjects the eye to constantly focus light and causes blurry vision.
- Symptoms may include headaches as well.
- Circulatory issues caused by stress and tension are as well as causes of astigmatism.
- In this case, an accumulation of stress and tension in the neck muscles can lead to a restriction of blood flow to the head and eyes.
- Can you develop astigmatism if you are diabetic? Well, you might get confused but having a diabetes is another leading factor because certain individuals with this condition might spread or develop a type of astigmatism referred to as lenticular astigmatism.
For this situation the patient’s cornea is normal and the only anomaly is in the form of the lens. High blood sugar levels can adjust the shape of the lens and affect vision. This condition is transient as the shape of the lens come back to normal after effective treatment.
What habits cause astigmatism?
Astigmatism is usually inherited. It may also due to environmental factors such as reading habit and inadequate lighting. Choosing a fluorescent tube or light bulb has no effect on the formation of astigmatism, and the reflection of the blackboard in the classroom will not cause astigmatism.
How can you prevent astigmatism from increasing?
What can I expect if I have astigmatism? – If you have a small degree of astigmatism that doesn’t affect your vision, you might not need any treatment. If you have a significant astigmatism that makes it hard to see clearly, there are lots of ways your eye care specialist can treat it.
How do I stop my astigmatism?
Eyeglasses, contact lenses, or surgery can correct this problem. Contact lenses for astigmatism are called toric lenses. Some may need to be custom-made. They may cost more than ordinary contact lenses.
What should you avoid if you have astigmatism?
Don’t rub your eyes – Your eyes might be feeling itchy, and you probably think a slight rubbing won’t hurt. However, considering that astigmatism affects the cornea by making it abnormal, excessively rubbing your eyes might injure your cornea further. Avoid rubbing your eyes. If the itchiness persists, see a doctor.
How to reduce cylindrical eye power by food?
Diet: – Eating a healthy diet rich in vitamins, minerals, and antioxidants can also help to reduce the power of cylindrical eyesight. Foods such as leafy greens, fish, and nuts are rich in nutrients that can support eye health. Additionally, staying hydrated by drinking plenty of water can also be beneficial for the eyes.