Can astigmatism cause blindness?
Jun 29, 2022
Source: Cainiu Health
Dr. Chen You
Introduction
Generally, astigmatism does not cause blindness. When present, astigmatism typically results only in blurred vision or ghost images. However, if astigmatism is caused by corneal disorders such as keratoconus, progressive disease can lead to significant changes in corneal shape, resulting in increasingly severe astigmatism and, ultimately, blindness. If astigmatism arises from ocular trauma, blindness is unlikely in most cases—especially when the injury is not severe.
Astigmatism is primarily caused by congenital corneal abnormalities or acquired factors—such as prolonged poor eye posture, which can lead to eyelid pressure on the cornea and subsequently induce astigmatism. Astigmatism may result in blurred vision and visual fatigue; some patients worry that it may ultimately lead to blindness. So, can astigmatism cause blindness?
Can Astigmatism Cause Blindness?
In most cases, astigmatism does not cause blindness. Individuals with astigmatism typically experience only blurred vision or ghost images. However, if astigmatism arises from corneal diseases such as keratoconus, progressive changes in corneal shape occur as the disease advances, leading to increasingly severe astigmatism and, ultimately, potential blindness. If astigmatism results from ocular trauma, blindness generally will not occur unless the injury is severe; nonetheless, some degree of astigmatism may develop. Astigmatism remains correctable with spectacles. In confirmed cases of keratoconus, treatment should target the underlying keratoconus itself to slow its progression and thereby mitigate the worsening of astigmatism.
Primary correction methods for astigmatism include orthokeratology (corneal reshaping) lenses and conventional eyeglasses—both well-established and widely used approaches. These interventions effectively alleviate or control progression of astigmatism, stabilize refractive error, and prevent significant visual deterioration. Daily habits should emphasize good ocular hygiene and healthy visual practices: avoid prolonged screen time on smartphones or computers, ensure adequate rest, and refrain from chronic sleep deprivation.
Patients are advised to prioritize rest, avoid visual overexertion, and maintain proper ocular hygiene. We hope this information proves helpful.
