For vision testing at 2.5 meters (8.3 ft.)
Acuity range 25.2M to 1.0M (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
Contrast sensitivity testing is highly recommended with the use of large ETDRS Illuminator cabinet (Cat. No. 2425). Contrast tests are highly calibrated with retro-illumination cabinet. Without illumination cabinet, contrast tests levels may not be accurate. Illuminator cabinet provides an accurate and constant illumination while testing.