Risley rotary prism

Ris·ley ro·ta·ry prism

(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.
Farlex Partner Medical Dictionary © Farlex 2012

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Risley,

Samuel D., U.S. ophthalmologist, 1845-1920.
Risley pliers
Risley rotary prism - used in examination of ocular muscle imbalance.
Medical Eponyms © Farlex 2012