Which Is More Alarming: Astigmatism or Myopia?
Jun 29, 2022
Source: Cainiu Health
Dr. Chen You
Introduction
Both astigmatism and myopia are types of refractive errors. Although their severity may be comparable, their underlying causes differ. Myopia primarily results from an elongated eyeball, causing light rays from distant objects to focus in front of the retina. Astigmatism, by contrast, arises mainly from irregularities in the cornea or lens, leading to incoming parallel light rays failing to converge at a single focal point. The predominant symptom of both conditions is reduced visual acuity, necessitating a professional refraction examination at a hospital or eye care facility.
In daily life, many people experience eye problems. With the widespread use of smartphones, computers, and other digital devices, an increasing number of individuals are developing astigmatism and myopia—conditions that significantly impact quality of life. So, which is more concerning: astigmatism or myopia?
Which Is More Concerning: Astigmatism or Myopia?
Both astigmatism and myopia fall under the category of refractive errors. While their severity levels may be comparable, their underlying causes differ. Myopia primarily results from an elongated eyeball, causing light rays to focus in front of the retina. In contrast, astigmatism arises mainly from irregularities in the cornea or lens, preventing parallel light rays entering the eye from converging at a single focal point. The primary symptom shared by both conditions is reduced visual acuity. Therefore, it is essential to visit an ophthalmologist for a comprehensive refraction examination to determine the specific type and degree of refractive error. Based on the examination results, appropriately prescribed corrective lenses should be worn: concave lenses are used to correct myopia, whereas cylindrical lenses must be aligned along a specific axis to correct astigmatism. Importantly, myopia and astigmatism often coexist, and a single pair of glasses can effectively correct both conditions simultaneously.
Astigmatism varies in type, severity, and treatment approach. For regular astigmatism, corrective lenses are selected according to both the type and degree of astigmatism. Hyperopic astigmatism is corrected with convex lenses; myopic astigmatism, with concave lenses; and mild astigmatism may not require correction if asymptomatic. If visual acuity declines or eye strain occurs, corrective lenses are recommended. In children—especially preschool-aged children—astigmatism must be fully corrected to prevent amblyopia (lazy eye).
Patients are advised to minimize eye strain, avoid rubbing their eyes frequently, and engage regularly in outdoor activities. We hope this information proves helpful.
