Our phoroptor connection hole default diameter is 20.3mm
Features: New Style---Ready to catch up with the New Phoroptor Appearance! Specifications: 1. Measurable Range: • Sphere Power Range: +16.75D~-19.00D,Step 0.25D • Cylinder Power Range: Concave(-): 0.00D to -6.00D Convex(+): 0.00D to +6.00D (Optional) (0.00D to 8.00D with additional lens of-2.00D) Step: 0.25D • Cylinder axis: 0 to 180°, 5°steps • Cross Cylinder: ±0.25 D • Rotary prisms: 0 Δ to 20 Δ,1Δ steps 2. 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 Δ I] or [6 Δ U] -10 Δ base-in-left eye 6 Δ base-up-right eye (Dissociating prisms) [±.50] -±0.50 fixed cross cyliner [OC] - Occluder 3. P.D.adjustment: 48-75mm,1mm steps 4. Standard Accessory lens: Two-.12D and -2.00 cylinder lenses. Two plano lenses for sealing front opening. 5. Standard Accessory: One near point card with holder and rod,dust cover,face shield and case for lenses. 6. Dimensions: 345×350×155(mm) 7. Net weight: Approx.4.5Kg The Default Option for the Phoroptor is Minus Cylinder !