There is no rule to convert the prescription to "20/20" type measure,You can get an approximation if you are shortsighted.
20/200 -2.50.So you may be 20/80.
No, you can't convert it. 20/20 vision is considered to be "normal" vision, meaning you can read at 20 feet a letter that most human beings should be able to read at 20 feet. If the smallest letters you can see are 20/30, then you see 20/30. The prescription your doctor gives you will allow you to see your best.
20/20 vision is like the ultimate goal for many people%u2019s quest for better eyesight. Chances are you had seen LASIK advertisements promising 20/20 eyesight.In fact 20/20 vision is so prevalent in our society that they have an American TV show called 20/20.Before we go there, let%u2019s understand what visual acuity means. Visual acuity means sharpness of your vision or how far can you see.During your school days or work requirements, you probably had been tested on the 20/20 scale before. Visit : custom essay writing service (https://essayacademia.com)