VT-80 Black Phoropter Refractor Vision Tester

Specifications Excellent engineering design with outstanding performance 1. Sphere power Range: +16.75D to-19.00D, with minimum reading 0.25D or 0.12D (when+0.12D auxillary lens or optional ±0. 12D lens in use) +26.75D to-29.00D (when optional ±10.00D lens is in use) 2. Cylinder power range: 0 to-6.00D, with minimum reading 0.25D or 0.12D (when auxiliary lens is in use) 0 to-8.00D (when-2.00D auxiliary lens is in use) 3. Cylinder axis Range: 0° to 180° each step is 5° 4. Cross cylinder: ±0. 25D, reversal type (synchronized with astigmatic axis) ±0.50D optional 5. Rotary prism: 0 to20ΔD in1ΔD step 6. Interpupillary adjustment： 50mm to 80mm， each step is 1mm (right and left synchronized) 7. PD adjustment: 48mm to 80mm in 1mm step(right and left synchronized) 8. Forehead rest adjustment: 16mm backward and forward 9. Convergence:The optical axes of the lenses are aligned at a distance of 400mm from the vertexes of the comeas(2mm each for right and left inward) Interpupillary distance enab