Notations for testing at 40 cm (16 in.)
Acuity range 8M to .20M
(20/400, 6/120 to 20/10, 6/3 equiv.)
Front side 2.5% contrast
Back side 10% contrast
40cm (16 in.) cord to maintain viewing distance
Measures 18 X 23 cm (7 X 9 in.)
Near Vision test uses both 2.5% and 10% contrast to test for contrast sensitivity. Test uses traditional Sloan optotypes in an ETDRS format. This helps in accurate vision testing and reliable results. Test is for use at 40 cm for near vision testing includes an accurate length cord to maintain viewing distances.
IS
