Manual Phoropter Optical Refractor Minus Vision Tester New

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Manual phoropter Minus vision Tester<br>Specifications:<br>Sphere powers range: +16.75D to－19.00D, with minimum reading 0.25D or 0.12D<br>(When +0.12D auxiliary lens or optional±0.12D lens is in use)<br>+26.75D to－29.00D (When optional ±10.00D lens is in use)<br>Cylinder power range: 0 to－6.00D, with minimum reading 0.25D or 0.12D (when auxiliary lens is in use)<br>0 to－8.00D (when－2.00D auxiliary lens is in use)<br>Astigmatic axis scale: 0 to 180° in 5° steps<br>Cross cylinder:±0.25D, reversal type (synchronized with astigmatic axis)<br>Rotary prism: 0 to 20∆D in 1∆D step<br>Interpupillary adjustment: 48mm to 80mm in 1mm step (right and left synchronized)<br>Forehead rest adjustment: 16mm backward and forward<br>Convergence: The optical axes of the lenses are aligned at a distance of 400mm from the vertexes of the corneas (2mm each for right and left inward)<br>Interpupillary distance enabling convergence=50mm to 80mm<br>Corneal distance device: 2mm forward and 5mm backward from standard plane; with scale<br>Effective field of view: 19mm<br>Weight: 4kgs<br>