Selecting the Proper Power for Reading Glasses
1)Print this page. You cannot use this chart by looking at it on your monitor due to the size and resolution differences among computers.
2) The chart you see below is exactly 5 inches wide. Please make sure it is 5 inches wide on your printed copy.
3) Read the following chart from a distance of about 14 inches. The first line you have difficulty reading has a lens strength to the right of it.