[A variable prism].
A new compact and convenient prism consisting of a planoconvex and a planoconcave cylindrical lens varies continuously in strength between 0 and 90 prism diopters. The relationship between the angle of incidence and the prism dioptric power is discussed.
Zhou
W
W
Henan Institute of Ophthalmology, Zhengzhou.
Wang
J P
JP
D006801:Humans; D007909:Lenses; D055095:Optics and Photonics / Q000295:instrumentation*; D013285:Strabismus / Q000175:diagnosis