What is a 4.6?

It is impossible to judge the refractive power by uncorrected vision 4.6. The

refractive error reflects the refractive power of the whole eye, usually affected by myopia, hyperopia, astigmatism and other factors. Vision refers to the retinal imaging ability of the fundus, reflecting the visual sensitivity. There is no corresponding relationship between the two. Therefore, it is impossible to judge the refractive power by uncorrected vision 4.6. If the patient needs to know the accurate refractive error, it is recommended to go to a regular medical institution for professional optometry to obtain the correct value

.