For testing at 4 meters (13 ft.)
Acuity range 40M to 2M (20/200, 6/60 to 20/10, 6/3 equiv.)
Test includes soft-tipped pointer, 50 recording forms (CAT. NO. 2514) and test instructions
Measures 62 X 65 cm (24.5 X 25.5 in.)
CAT. NO. 2425 Illuminator Cabinet is necessary with these translucent low contrast charts
Low contrast vision tests are calibrated using a constant and uniform retro illumination. This illumination is provided by Cat. No. 2425 ETDRS sized illuminator cabinet. With the use of this cabinet, illumination is set at a constant level and contrast levels can then be calibrated to that situation. Without the use of the illuminator cabinet, the contrast charts would not have proper lighting and will not be as accurate.
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