Adopting concentrated poeration and large scale and improving performance. Automatically interlock between cross-cylinder lens and lens coordinates. Sphere range 19.00D ±16.75 (Step: 0.25D). Cylinder range 0.00D - -6.00D (Step: 0.25D) ( 0.00D to 8.00D with additional lens of-2.00D). Cylinder axis 0 to 180°, 5°steps. Cross Cylinder     ±25 diopters. Cross-cylinder lens ±0.25D. Rotary prisms     0 to 20, one steps. PD adjustment 48-75mm, 1mm steps.
Dimensions (LxDxH) 345×295×85mm.