What is the degree of myopia for an eye with a visual acuity of 4.0?
Nov 13, 2024
Source: Cainiu Health
Dr. Wang Shuai
Introduction
Eye vision of 4.0 is usually obtained through identifying the visual acuity chart, indicating that the subject cannot clearly recognize relatively large letters or symbols on the chart at the standard testing distance. According to the common correlation between visual acuity and myopia degrees, an eye vision of 4.0 roughly corresponds to myopia ranging from 400 to 600 degrees. If vision deterioration occurs, it is recommended to seek medical attention promptly.
Generally, a vision level of 4.0 corresponds to myopia (nearsightedness) of approximately 400 to 600 degrees. The detailed explanation is as follows:
A vision level of 4.0 is typically obtained by identifying characters or symbols on an eye chart. It indicates that the person being tested cannot clearly recognize relatively large letters or symbols on the chart at the standard testing distance. According to the common correlation between visual acuity and myopia, a vision level of 4.0 generally corresponds to about 400 to 600 degrees of myopia.
Myopia is usually categorized by refractive error: 100 to 300 degrees is considered mild myopia, 300 to 600 degrees moderate myopia, and over 600 degrees high myopia. Since the degree of myopia corresponding to a vision level of 4.0 falls within the range of 400 to 600 degrees, it is generally classified as moderate myopia.
When experiencing a decline in vision, it is recommended to seek timely medical attention and undergo a comprehensive eye examination at a qualified hospital, so that doctors can implement appropriate measures based on the test results, such as wearing glasses or undergoing surgical treatment.
In daily life, it is important to use your eyes scientifically and avoid prolonged close-up activities like reading, writing, or using electronic devices to prevent worsening of myopia.
