We at D SA Exports offers Optical Trial Lens Set - A kind of ophthalmology diopter calculating tools, used by hospital ophthalmology and optical store to exam people's dioptric situation: hyperopia, myopia, presbyopia, astimastism, strabismus or color blindness. Trial Lmore...
An ideal trial frame have minimum 3 cells, one each for holding spherical lens, cylindrical lens and other tools like occluder or pinhole. Angle for axis of astigmatism is marked on outermost visible cell There are knobes to adjust pupillary distance, side angle, height and cylinmore...