(riz'lē), a prism with a circular base that is rotated in a metal frame marked with a scale; used in examination of ocular muscle imbalance.
Ris·ley ro·ta·ry prism
(riz'lē rō'tŏr-ē prizm) A prism with a circular base that is rotated in a metal frame marked with a scale; used in examination of ocular muscle imbalance.
Risley,
Samuel D., U.S. ophthalmologist, 1845-1920. Risley pliersRisley rotary prism - used in examination of ocular muscle imbalance.