Sphere: 0.00~-19.00 Diopters, step: 0.25, 0.5, 1,3

0.00～+16.75 Diopters，step: 0.25, 0.5, 1,3

Cylinder:0.00～± 8.75 Diopters, step: 0.25, 0.5, 1,3

Cylinder Axis: 0° to 180°, step: 1° ,5°

Prism form: Base up, base down， base in，base out

Near distance: Mechanical converging with an optical axis at 30 to 40 in front of eye

Binocular balance: Rotary prism, polarizing filter and R & G filter

Cross cylinder: ± 0.25D

PD: 50 to 80mm in 1 and 0.5mm step

Retinoscope: +2.00D or +1.50D both sides

Corneal alignment: 12 to 20mm by 2mm step

Field of view 35°

Power source: AC 110-120V/220-240V.50/50Hz,90VA

Dimension: 350 (W) x300 (H) x80 (D) mm

Net weight: 4kgPower supply: AC 110-240V 50/50Hz

Horsepower: 60w