Auto Refractometer with Keratometer Adjustable Easy operation: only two buttons

Easy operation: only two buttons on the machine

2) SpO2 and Pulse Rate display

Portable and lightweight: only 16Ibs

it's really not that difficult

Auto Refractometer with Keratometer Adjustable Easy operation: only two buttonsFeatures 1. 9" tiltable color LCD for user friendly operability. 2. PD Automatic measurement function, automatically PD value. 3. One key lock function, quickly locking mobile platforms. 4. Motorized chinrest. 5. Auto detachment printer. 6. FA 8000k with keratometer function. Specifications Refractive measurement Sphere 20~+20D (VD=12) 0. 125D step Cylinder 8~+8D,0. 125D Step Axis 0~180 (1step) PD 45~88mm, 1mm step VD 0mm, 12mm, 13. 75mm Min. Pupil