What is 100-degree myopia in terms of decimal visual acuity?

In general, 100 degrees of myopia usually corresponds to a visual acuity of 0.8–1.0 on the eye chart. However, the specific situation depends on individual factors such as accommodative ability and whether astigmatism is present. If there are vision abnormalities, it is recommended to seek medical evaluation promptly. Detailed analysis is as follows:

Individuals with 100 degrees of myopia who have good accommodative function and no astigmatism typically achieve a visual acuity of 1.0 on the eye chart. In these individuals, the ciliary muscles function normally, allowing flexible contraction of the lens when focusing on near objects. When viewing distant objects, their eyes can compensate for the myopia through natural accommodation, resulting in relatively clear retinal imaging. Daily vision is generally not significantly affected, and they may not need to rely heavily on glasses.

For individuals with 100 degrees of myopia but poor accommodative ability or accompanying astigmatism, visual acuity may be around 0.8. Poor accommodation means the eye muscles cannot effectively compensate for the refractive error, leading to blurred distance vision. If astigmatism is also present, irregularities in the eye's refractive surface further distort the image, causing more noticeable vision decline. In such cases, professional examination is necessary to accurately assess true visual performance.

Avoid prolonged and continuous use of electronic devices; take a break every 30 minutes by looking at green plants at a distance for 5 minutes. Maintain proper reading and writing posture, keeping the eyes approximately 33 cm from the book or screen, and ensure adequate lighting. Spend at least 20 minutes daily on outdoor activities to promote ocular blood circulation. Schedule regular eye exams at a hospital to monitor vision changes promptly and prevent worsening myopia.