Optimetrics Phoropter 3000 (this product is not available in the US and Canada market) Adopting overall concentrated operation and large scale and improving performance. Automatic interlock between cross-cylinder lens and lens coordinates. 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? steps Auxiliary lens dial: [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 cyliner [OC]- Occluder P.D.adjustment: 48-75mm,1mm steps Standard Accessory : One near point card with holder and rod,dust cover,face shield and case for lenses. Standard Accessory lens:Two-.12D and -2.00 cylinder lenses. Two plano lenses for sealing front opening Dimensions: 345×350×155(mm) Net weight: Approx.4.5Kg