New range of stand magnifiers based on standardized image position.
Combined Optical Industries Ltd. of Slough, UK, have released a new range of illuminated stand magnifiers. These have been designed with a uniform emerging vergence and are specified in terms of equivalent power according to the new standards. This paper describes these magnifiers in terms of their measured optical and ergonomic properties. The expected enlargement ratios achieved with typical presbyopic additions are tabulated.
Rumney
N J
NJ
Vision Services, Birmingham Royal Institution for the Blind, Harbone, UK.
D004867:Equipment Design; D006801:Humans; D007909:Lenses / Q000592:standards*; D055095:Optics and Photonics; D011305:Presbyopia / Q000534:rehabilitation