Portable Auto Refractometer Vision Screener for Children

Portable Auto Refractometer Vision Screener for Children Portable Auto Refractometer with Touch Screen Specifications: Operation mode Bino/Mono Optometry Automatic DS Range: -7.50D~+7.50D, Resolution: 0.25D/0.01D Accuracy: ±0.50D DC Range: 0.00D~3.00D, Resolution: 0.25D/0.01D, Accuracy: ±0.50D Axis Range: 1°~180° Axis: Range 1°~180° Resolution: 1° Accuracy: ±5° Pupil size Range: 4.0mm~9.00mm Resolution 0.1mm Accuracy: ±0.1mm Pupil distance Range: 35mm~80mm Resolution: 1mm, Accuracy: ±1mm Gaze 0°~20° Measuring distance 1m±5cm Time per measurement ~1s Fixation target Light flash, attractive sound Date interface Wi-Fi, USB Battery Rechargeable lithium batteries, 6 hours of duration, Replaceable Size 180mmX130mmX110mm Display 5 inch touch screen Weight 0.8Kg Optional accessories Camera tripods, printer, etc