Function: noun
Date: 1943
: a chart read at a fixed distance for purposes of testing sight especially : one with rows of letters or objects of decreasing size
Function: noun
Date: 1943
: a chart read at a fixed distance for purposes of testing sight especially : one with rows of letters or objects of decreasing size
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012