Variable Tranaglyph series 500 complete kit (500 series)

The Variable Tranaglyph - Complete Kit (500 Series) is a tool used to help patients improve the ability of the eyes to work together and improve the ability of the eyes to converge inward and diverge outward (fusional reserves) and also improve the ability of the eyes to sense depth (stereopsis). And it does so by training the patient's skills in convergence and divergence of the eyes. The kit includes: three pairs of variable polarized slides featuring red and green targets measuring 5.5 inches × 10.5 inches (13.97 cm × 25.4 cm) on transparent vinyl. Red and green glasses. A holder for the slides, horizontal, held by hand. Two red indicators.