Description
The Snellen viewing chart is the well-known, classic table with large and small letters. The table consists of 11 lines of block letters, starting with a large single letter in the top row. The number of letters in each line increases from top to bottom. The size of the letters decreases progressively, so there are more letters on each subsequent line. Visual acuity test at 10 feet away and equivalent to 20 feet. Visual acuity range 20/100 to 20/16.