Prism: Loose Prism Set

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These high-quality prisms are used to measure the deviation in strabismus. It is important to conduct polarized testing through prisms that are known to cause the least interferenc e with polarization. Available in 2 sets: 16 Piece Prism Set includes: ½, 1, 2, 4, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, and 50 diopter plus red lens. Each measures 37 mm square. 22 Piece Prism Set includes: ½, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, and 50 diopter plus red lens. Each measures 37 mm square. Case dimensions: 16" x 3" x 1.75" (40.6 cm x 7.6 cm x 4.45 cm. Lens dimensions: 38 mm x 38 mm. Both sets come packed in a foam-lined hard plastic case for added protection. Show more