radiuscope

radiuscope 

Instrument used for measuring the radius of curvature of the surfaces of a contact lens. It is based on the Drysdale method. Syn. optical microspherometer. See Drysdale's method; Toposcope.
References in periodicals archive ?
Other items that are recommended are single use diagnostic trial lenses and a radiuscope, with topographers and tear film assessment equipment suggested for consideration.
Although similar in appearance to a conventional radiuscope, rather than the practitioner having to look into a small eyepiece, the focusing system is displayed on a 5.