How much vision counts as myopia?
Nov 18, 2025
Source: Cainiu Health
Dr. Wang Lei
Introduction
If uncorrected visual acuity is below 1.0 (e.g., 0.8, 0.6), and refractive examination via automated refraction or cycloplegic refraction reveals myopic refractive error (e.g., 50 degrees, 100 degrees), with other eye diseases ruled out, myopia can be diagnosed. This condition is commonly seen in individuals who engage in prolonged near-work; they experience blurred distance vision, which can be corrected to normal by wearing appropriate myopic glasses.
Generally, if uncorrected visual acuity is below 1.0 and a refraction test reveals myopic refractive error, myopia can be diagnosed. However, decreased vision alone does not necessarily indicate myopia. If in doubt, it is recommended to seek medical advice promptly. Detailed analysis is as follows:
If uncorrected visual acuity is below 1.0 (e.g., 0.8 or 0.6) and an automated or cycloplegic refraction test confirms the presence of myopic refractive error (e.g., -0.50D or -1.00D), with no other eye diseases identified, myopia can be confirmed. This condition is commonly seen in individuals who frequently engage in prolonged near-work activities. They typically experience blurred distance vision, which can be corrected to normal with appropriate myopic eyeglasses.
If uncorrected visual acuity is below 1.0 but no myopic refractive error is found during refraction testing, the cause may be pseudomyopia, hyperopia, or astigmatism. Pseudomyopia is often caused by ciliary muscle spasm and can usually be reversed with adequate rest and eye relaxation. Individuals with hyperopia or astigmatism may also have reduced vision, but their refractive status is not myopic. Wearing incorrect myopia-correcting glasses without proper diagnosis may worsen eye discomfort.
Upon noticing vision decline, individuals should visit a qualified healthcare provider for cycloplegic refraction to differentiate between true and pseudomyopia. It is important to avoid prolonged near-vision tasks in daily life; take breaks every 30 minutes by looking into the distance to relax the eyes. Regular vision check-ups and maintaining a personal vision record are recommended. If myopia progresses rapidly, timely intervention and control measures should be implemented.
