SPECIFICATIONS :- Coincidence focusing system. 15x eyepieces. Total Magnification 10x, 16x, and 25x One position instrument Measure both meridians without changing optical system. Simple vertical adjustable head to fit patient. Astigmatic axis Oto 180 head to fit patient. The acgromatic optical systems to precise measurement of the corneal radius curvature and accurate measurement of radius curvature of contact lens. Dual eye-level sighting system. Measuring range : Radius of curvature, 9.5 - 6.5 mm (in 0.25 mm steps). Dioptre 36 - 52 (in 0.25 steps).