Extremely simple and quick to use screening device for the early detection of refractive errors. It allows you to test eyesight in natural conditions, under various lighting. Ideal for screening tests in preschool children (thanks to its simplicity it ensures their full cooperation during the examination), in occupational medicine and as a near test (examination for reading glasses). It can replace the scopes gauge for fast refraction testing. Unlimited carrying possibilities thanks to small dimensions (after folding the "halves": 15.5 x 12.5 x 2.0 cm) and minimal weight (18.6 dkg). It does not require an electric power supply.
* purpose: early detection of myopia, hyperopia, presbyopia, anisometropia
* PD: 45 to 78mm
* lenses: biconvex / biconvex from -4.0D to + 4.0D
* field of view: 40 °
* measurement range: binocular measurement - spheres from 0 to +/- 4