For vision testing at 2.5 meters (8.3 ft.)
Acuity range 25.2M to 1.2M (20/200, 6/60 to 20/10, 6/3 equiv.)
Only standardized format accepted in studies sponsored by the National Eye Institute
Designed for use in clinical studies and low vision evaluations where accurate, repeatable visual acuity measurements are required
Lines are of equal difficulty
Geometric progression in letter size from line to line
Letter size is only variable
Measures 62 X 65 cm (24.5 X 25.5 in.)
Eye Chart fits the ETDRS Illuminator Cabinet CAT. NO. 2425
Can be wall-mounted
ETDRS eye charts use a non-reflective, white high-impact polystyrene material to maintain a constant high contrast between the optotypes and the background. The use of our ETDRS Illuminated Cabinet helps to sustain a standardized continuous illumination while testing.
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