Snellen Chart : Https Encrypted Tbn0 Gstatic Com Images Q Tbn And9gcsf3odf03jkrqpl0dkgm5bl 8lqx Wg7x3u6shv7oxoqyqned52 Usqp Cau / If the test page is in another format, or if you wish to perform the test facing the screen, you will have to calculate the distance at which you must stand facing it, using the following formula:

Snellen Chart : Https Encrypted Tbn0 Gstatic Com Images Q Tbn And9gcsf3odf…