Notations for vision testing at 4 meters (13 ft.)
Acuity range 40M to 1.6M (20/200, 6/60 to 20/8, 6/24 equiv.)
Two smaller groups 8M to 1.6M for repetitive testing (20/40, 6/12 to 20/8, 6/24 equiv.)
Measures 62 X 65 cm (24.5 X 25.5 in.)
Fits ETDRS Illuminator Cabinet CAT. NO. 2425
Can be wall-mounted
Often times patients not familiar with the Roman Alphabet recognize numbers. The use of numbers in an ETDRS chart, help to create an almost universal chart for testing. Patients must simply gesture the number they see if the administrator does not speak the same language. This ability makes testing easier and more accurate.
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