phone number in Harrisburg, PA [ About 13 Results ]

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  • We can't decide what kind of reading glasses you need by the number 20/40 cuz we can't change it to a prescription required in corrective glasses. You will need a more specified prescription to decide what number you need .

  • Glasses size includes lense width which is also called eye size, bridge width and temple length. So the number "50,18,140" on your glasses means that your eye size is 50 millimeters, bridge width is 18 millimeters and the temple length is 140 millimeters.

  • 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.

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