Eye vision 5.0 is the standard of logarithmic visual acuity table vision completely normal, the corresponding standard visual acuity table is 1.0, that is, this vision is up to standard, completely normal. In the daily physical examination if the visual acuity can reach 5.0, belongs to the normal standard, do not continue to check down, of course, there are better than 5.0 vision, such as 5.1, 5.2, relative to the logarithmic visual acuity table of 1.2 and 1.5 or so. When the vision drops it will be below 5.0, 4.5 is equivalent to about 0.2 and 4.8 is equivalent to about 0.6. There is a conversion table between the visual acuity table and the normal visual acuity table, and the logarithmic visual acuity table, which is 5.0, is used more often when doing medical examinations. However, in hospitals the standard 1.0 vision chart is used more often, and 5.0 is used as the normal standard for checking vision.