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The Ishihara test is a simple, proven method for detecting congenital color vision deficiency (Protanomaly, Deuteranomaly, Dichromacy, Protanopia, and Deuteranopia). Color plates are encased in specially designed album-type books for ease of handling.
Designed to rapidly test for amblyopia and strabismus using gross thru fine stereopsis (4800 to 20 seconds of arc).
Stainless steel groover panel,special lens grooving,PC lens wheel.
Polarized window glass, Without printing device, Beige baking varnish appearance