A visual acuity of 0.5 in an adult patient indicates a loss of vision, but the degree of myopia cannot be inferred from the patient’s naked-eye visual acuity, and the patient can determine the degree of myopia through an optometry examination.
Myopia can lead to vision loss, generally the higher the degree of myopia, the more obvious vision loss. However, there is no one-to-one quantitative relationship between myopia and visual acuity. Even with the same amount of myopia, the patient’s visual acuity may not be consistent. Furthermore, vision loss is not always caused by myopia, but also by cataracts and macular degeneration.
If a myopic patient wants to determine the degree of myopia, the patient can undergo an optometry examination, and generally young children need to perform dilated optometry.
It is recommended that patients with significant vision loss seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.