Essence Manual Phoropter: Minus Cylinder
Synchronized cross-cylinders (+) or (-); spherical lens ranging from -19.00DS to +16.75DS in 0.25D steps (0.12D steps with auxiliary lens); cylindrical lens ranging from 0 to -6.00D in 0.25D steps (0 to -8.00D and in 0.12D steps with auxiliary lens); axis of cylindrical lens adjustable in 5° steps; cross cylindrical lens ±0.25D; rotary prism range of measurement 0, -20, step 1; pupil distance range 1.97in / 50mm to 3in / 75mm, step 0.04in / 1mm; aggregated adjustment 0.15in / 380mm; and adjustment of forehead rest 0.63in / 16mm., 2-year ltd. warranty