VT-100 Auto Phoropter Refractometer is widely used by eye care experts for eye examinations so that they can further recommend the suitable glasses and lenses for the person under treatment. It features easy one key locking knob which help to prevent un-wanted movement over base during intermittent use. VT-100 Auto Phoropter Refractometer provide a accurate and wide measuring range with its two selected mode ie. Auto and manual mode of measurement. Measuring Range: Sphere: -29.00~+26.75D（step：0.25D/0.5D/1D/2D/3D） Cylinder: 0.00~8.75D (step:0.25D/0.5D/1D/2D/3D) Cylinder Axial: 0~180°（step:0.25D/0.5D/1D/2D/3D） PD: Far: 48~80mm, Close: 45~75mm (step:0.5/1.0mm) Working Distance: 35~70cm（step：5cm） Prism: 0~20Δ(step:0.1Δ/0.2Δ/0.5Δ/1Δ/2Δ) Jackson Cross Cylinder: Jackson cross cylinder 0.25D, Jackson cross cylinder 0.5D, 0.25D Dual Cross Cylinder (separation prism Ophthalmoscope: +1.5D，+2.0D（measuring distance 67cm, 50cm） Weight: 447(W)x130(D)x288(H)mm, 6.5kg Keyboard: 214(W)x215(D)x187(H)mm, 1.0kg Junction box: 266(W)x72(D)x240(H)mm, 1.0kg Power: AC100~240V, 50/60Hz Total power: 140VA Package Size: 580(W)x430(D)x480(H)mm Auxiliary Lenses: Pinhole lens: Ø1mm Maddox: Right (red/horizon), left (red/vertical) Red and green lens: Right (red), left (green) Polaroid: Right （135°，45°），left（45°，135°） Separation prism: Right（6ΔBU）left（10ΔBI） Solid Suprachiasmatic Cylinder: 0.50D Auto Phoropter View Tester VT-100 (Digital)