Can eyeglasses correct astigmatism?
Jan 24, 2022
Source: Cainiu Health
Dr. Cui Xin
Introduction
Glasses can correct astigmatism. Regular astigmatism is typically corrected with eyeglasses (spectacles), whereas irregular astigmatism usually requires correction with contact lenses. Therefore, the type of astigmatism determines the appropriate corrective method.
Astigmatism—a common visual condition—occurs when the eye’s cornea or lens has an irregular curvature, causing light to focus unevenly on the retina. Many individuals with myopia also experience astigmatism. Therefore, timely and appropriate corrective measures are essential. Incorporating vitamin A–rich foods into your daily diet and practicing proper eye protection can help prevent worsening of symptoms.
Can Glasses Correct Astigmatism?
Yes, glasses can effectively correct astigmatism. Regular (or “regular”) astigmatism is typically corrected with conventional eyeglasses, whereas irregular astigmatism usually requires rigid gas-permeable or specialized soft contact lenses. Thus, the choice of correction method depends on the type of astigmatism present.
Astigmatism arises from uneven elevations and depressions across the corneal surface. When light passes through such an irregular optical medium, it scatters rather than traveling along its intended path—preventing light rays from converging at a single focal point on the retina.
Astigmatism can be classified by axis orientation as either with-the-rule (WTR) or against-the-rule (ATR), and by structural pattern as either regular or irregular.
WTR astigmatism occurs predominantly along the horizontal meridian of the cornea, while ATR astigmatism occurs along the vertical meridian. Clinically, ATR astigmatism significantly impacts visual acuity—even low degrees (e.g., 25–50 diopters) can markedly affect clarity. Special attention must therefore be paid during refraction.
If you suspect astigmatism, do not ignore it—seek prompt medical evaluation at an ophthalmology clinic or hospital. Many people mistakenly believe that astigmatism will resolve spontaneously without treatment; this notion is entirely incorrect. Once astigmatism develops, it does not revert to a non-astigmatic state on its own.
The goal is to slow or halt progression of astigmatism, prevent high-degree astigmatism, and avoid significant vision deterioration. Adopting healthy visual habits and maintaining good ocular hygiene are crucial: avoid prolonged near work, refrain from extended smartphone use—especially late at night—as these behaviors may accelerate increases in astigmatic power.
We hope the above information is helpful. Wishing you good health and happiness!
