Yuself Optical acrylic ophthalmic prisms have been processed to solve the problem of birefringence which can hinder their use in certain clinical applications. Our exclusive manufacturing process greatly reduces optical strain, producing prisms that virtually eliminate clinical birefringent effects.  Our prisms are calibrated for use in the frontal plane position. 

ALP23H - Acrylic Prism Set with handle
( available with 0.5, 1, 2, 4, 5,  6, 7,  8, 9, 10, 12, 14, 16,  18, 20, 25, 30, 35, 40, 45, 50 Diopter and RF)