AISITESY Optical Retinoscopy The Quick Examination of Diopter of Spectacles 2 Bars 32 Lense Sphere Plastic Bar Ophthalmic Equipment Refraction Inspection +/- 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4-10, 12,15 - Product Features
1?32 lenses altogether (16 in each bar), 2 bars for each of concave (-) and convex (+); MINUS in red and PLUS in black Sphere: +/- 0.50, 1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 5.00, 6.00, 7.00, 8.00, 9.00, 10.00, 12.00, 15.00
2?Package: Comes with a blue pocket for protective product storage Red & Black Blue nylon packet included
3?Design Adopting environmentally friendly materials, safe and healthy.
4 Application: it is suitable for the quick examination of diopter of spectacles
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