Vertex power range : 0 ± 15D Accepted lens diameter : 20 mm - 80 mm Cylinder axis : 0 - 180° (Step : 5°) Prism axis : 4 prism diopter (Step : 1 prism diopter) Eyepiece focusing : -5D à +5D
This frontofocometer is used to measure spherical, cylindrical and prismatic frontal power.