Visual acuity of 0.6 with refractive error means that the patient is currently suffering from refractive error such as myopia, astigmatism or hyperopia, and at the same time has a decrease in naked-eye visual acuity, which is lower than normal. Refractive error is a common disease in ophthalmology, which can be categorized into myopia, hyperopia and astigmatism, all of which may cause patients to lose their vision, and patients need to undergo an optometry examination to determine the specific type of refractive error as well as the degree of refractive error. A patient with a naked eye visual acuity of 0.6 is considered to have mild vision loss and should normally have a naked eye visual acuity of 1.0 and above. Current vision loss may be related to refractive error, but it may also be related to other eye diseases, such as cataracts and glaucoma. It is recommended that patients with vision loss seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.