Properties of anaglyphic materials that affect the testing and training of binocular vision

Unequal retinal illuminances and target contrasts, and ghost images of anaglyphs can affect binocular vision. These properties were studied in red-green anaglyphic materials, and for all three pairs of red-green glasses tested, the luminous transmittance of the green member of each pair was higher than that of the red. Differences ranged from 15.3% to 33.1%. In all combinations tested, contrast was higher with the green lens when viewing red acetate than it was for the red lens when viewing green acetate. These marked differences between red and green materials are noteworthy because they can induce differences between the two retinal illuminances, thereby affecting suppression tendencies.