|The Frisby Pocket Stereo Test (1 Plate in sleeve)
All Frisby Stereo Test present "real depth" objects viewed with natural vision: no testing glasses are required. Each plate has four random-pattern squares, with a circle of pattern elements, lying in depth relative to its surround. The depth effect is due to the circle and its surround being printed on opposite sides of the plate.
This Frisby Pocket Stereo Test consists of 1 plate for stereo acquity screening.
Test plate and sleeve sized to fit in pocket.