Optel Model LP-22 high-quality acrylic prism available in loose prism set.
The doctor looks for any movement in the eye that is uncovered.
The prism and alternate cover test alternate the cover over both eyes while a prism is placed in front of one eye.
Prism lens: 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, 50. Total: 23 pieces, including one red filter lens. Package: Aluminium Case.
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