Measuring Range Spherical: -20~+20D(VD=12) 0.12D/0.25Dsteps Cylinder: -8~+8D 0.12D/0.25D steps Axis: 0~180 1 steps Pupil Distance: 45~85mm, 1mm steps Vertex Distance: 0mm, 12mm, 13.75mm Min. Pupil Size: 2.0mm Chart: Auto fog Display: 5"CRT Monito... [china]

Main Technology Parameters: Sphere: 0 to ±25D(0.01D, 0.12D, 0.25D steps) Cylinder: 0 to ±10D(0.01D, 0.12D, 0.25D steps)° Axis: 0-180°(1°Steps) ADD: 0 to 10D (0.01D, 0.12D, 0.25D steps) Prism: 0 to 10? 0.01D, 0.12?, 0.25? Steps) Step: 0.01D P... [china]

Technical data Total Magnification: 10X, 20X Objectives Magnification: 1X, 2X Work Distance: 100mm Imaging pixels: 795*596 Signals output: Video signals, USB Digital signals The Type of Miicroscopes: Converging Stereoscope, Interpupillary Dist... [china]

Measurement: +16.75------ -19.00(step 0.25D) Cylinder Power: 0.00---- 6.00D(step 0.25D) Cylinder Axis angle: 0--- 180(step 5) Weight: 4.5kg For more deails about this product, please feel free to contact us. ... [china]

Feathers of ar-800 auto refractometer Measured more quikly because the technology of built-in micro process and quick graphic process. Quick measurement for diopter of min. Pupil size. New design of colorful sreen(5.7 tft lcd). Auto fog chart. P... [china]

Test all kinds of lense. With printer, PD, UV. More details, please contact me.... [china]