Is it OK to be tested with an eye chart closer than 20 feet?
SEP 06, 2022
For an eye chart, my doctor uses a computer monitor screen attached to the wall. My concern is that it is much closer to my position than 20 feet. It is only about half that distance. Is this an appropriate method to test distance vision?
For purposes of testing distance vision, eye charts placed closer than 20 feet are considered acceptable as long as the letter size is adjusted accordingly. Such charts will usually indicate the recommended testing distance. Similarly, computer-based systems like the one you describe can be set up to adjust for a particular testing distance.