北京思博特医疗器械有限公司

ETDRS Low Contrast Letter Charts

ETDRS low contrast Sloan Letter vision chart with proportionally spaced (geometric progression) lines translucent low contrast letter chart with line sizes range from 20/200 to 20/10 (6/60 to 6/3) equivalent. Available in 5 contrast levels: 1.25%, 2.5%, 5%, 10% and 25%. Chart size is 24.5" x 25.5" (62 cm x 65 cm).

The 2.5% contrast chart is offered in 2 versions (500021 & 500021A). Both charts have a 2.5% contrast level but the optotypes are scrambled for repetitive testing situations.

13 feet, 4 meters testing distance.

Note: This chart can only be used with our ESV3000 or ESC2000 illuminated ETDRS cabinet