These loose prism sets include magnetically attachable handles that permit easier and less cumbersome counter-top storage, transport, and use than devices with permanently attached handles. The magnetically attachable handles are fast and simple to attach and detach. Strong rare-earth magnets hold the devices firmly on the handles, yet are easy to remove. 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 interference with polarization. 16 Piece Prism Set includes: 1/2, 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: 1/2, 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. Both sets come packed in a foam-lined hard plastic case for added protection.
