Range of astigmatism: 0 to -6.00D, the minimum reading is 0.25D or 0.12D (when using the attached lens) 0 to -8.00D (when using the attached lens -2.00D). Astigmatism axis dial: 0 to 180°, each interval is 5°.Rotating prism: each interval is 1D, 0 to 20D. Interpupillary distance adjustment: 48mm to 80mm, each interval is 1mm (the same for left and right). Adjustment of the front desk: 16mm forward and backward each. Focus: within 400mm from the tip of the cornea (2mm to the left and right inner sides), the axis of the optical lens is in a straight line.
Can focus from 57mm to 80mm within the interpupillary distance. The method of testing the corneal distance: starting from the standard platform, use a scale to measure the front 2mm and the back 5mm.
Effective field of view: 19mm. The item "Manual Optometry Refractor Optical Vision Tester Device Phoropter" is in sale since Monday, August 10, 2020. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Phoropters & Manual Refractors". The seller is "leadsoar" and is located in Zhengzhou.
This item can be shipped worldwide.