What is the normal level of astigmatism in the eyes?
Nov 17, 2025
Source: Cainiu Health
Dr. Wang Shuai
Introduction
Most people have a slight degree of astigmatism. When the astigmatism is within 50 degrees, retinal imaging is minimally affected, and clear vision for both distant and near objects can usually be maintained without noticeable symptoms such as blurred vision, double vision, or eye fatigue. In such cases, regular monitoring of vision changes is sufficient. However, some individuals may still experience mild discomfort due to astigmatism within 50 degrees, depending on their visual habits or ocular sensitivity.
Under normal circumstances, astigmatism of up to 50 degrees is considered within the normal range and generally does not significantly affect vision, nor requires special correction. If concerned, it is recommended to consult a medical professional early. Detailed analysis is as follows:
Most people have mild astigmatism in their eyes. When the degree of astigmatism is within 50 degrees, retinal imaging is minimally affected, allowing clear vision for both near and distant objects in daily life. There is typically no noticeable blurriness, double vision, or eye strain, so corrective glasses are unnecessary—regular monitoring of vision changes is sufficient. However, some individuals may experience mild discomfort due to eye usage habits or ocular sensitivity, even with astigmatism under 50 degrees; this can be alleviated by adjusting visual habits without requiring excessive intervention.
If astigmatism exceeds 50 degrees, especially when reaching 100 degrees or more, retinal images become blurred, potentially causing straight objects to appear distorted and unclear vision at both near and far distances. Prolonged uncorrected high astigmatism may lead to symptoms such as eye fatigue and headaches. In such cases, timely refraction examination is necessary, followed by wearing appropriate corrective lenses or undergoing other corrective treatments based on the measured degree. A rapid increase in astigmatism over a short period may indicate underlying eye problems and requires further evaluation to determine the cause.
When experiencing abnormal vision or suspecting abnormal astigmatism, one should visit a reputable ophthalmology department for professional refraction testing to accurately determine the degree and axis of astigmatism, avoiding self-diagnosis or reliance on non-professional assessments.
