Black Metal Optic Manual Refractor Vision Tester

Specifications： ● Sphere power: Range: +16.75 to -19.00D Step: 0.25D ● Cylinder power: range: 0.00D to +6.00D ( 0.00D to 8.00D with additional lens of+2.00D) Step: 0.25D ● Cylinder axis: 0 to 180°，5°steps ● Cross Cylinder: ±25 diopters ● Cross-cylinder lens: ±0.25D ● Rotary prisms: 0△ to 20△,1△ step ● Auxiliary lens dial: PD Adjustment: 50-80mm. Forehead rest adjustment: 16mm. Vertex distance: 13.75mm (From corneal point to standard lens surface.) --O］-Open aperture (two positions) ［ --R］-Retinoscopic lens,+1.50D --［P］-Polarizing lens,（45°left eye，135°right eye） -- ［WMV］or［RMV］-Maddox rod,vertical -- white — left eye -- Red — right eye -- ［WMH］or［RMH］-Maddox rod,horizontal -- white - left eye -- Red - right eye -- ［GL］- Green Lens -- ［RL］-red Lens -- ［+.12］- +0.12D Sphere -- ［PH］- Pin hole -- ［10△I］or ［6△U］-10△ base-in-left eye -- 6△ base-up-right eye (Dissociating prisms) -- ［±.50］-±0.50 fixed cross cylinder -- ［OC］- Occluder ● P.D.adjustment: 48-75mm,1mm steps ● Standard Accessory :