Good-Lite Random Dot 3 Stereopsis Test
Random Dot 3 Stereopsis Test
Designed to rapidly test for amblyopia and strabismus in early and non-readers and non-verbal children & adults. Expanded Random Dot 3S with easy symbols tests gross disparity at 900 650 500 and 400 seconds of arc. Test children at 400 200 100 seconds of arc. Graded circle test now down to 12.5 seconds with no monocular clues. New improved booklet has answer key on back cover and includes polarized viewers.