Hanchen Optical Retinoscopy Rack Lens Set Retinoscopy Bars for The Quick Examination of Diopter of Spectacles 2 Bars 32 Lenses Sphere: +/- 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4-10, 12,15

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
Package: It comes with a leather pocket for protection.
Application: it is suitable for the quick examination of diopter of spectacles
Design: It is safe and healthy with environmentally-friendly material and comes with smooth edge by fine workmanship.
32 lenses altogether (16 in each bar), 2 bars for each of concave (-) and convex (+); MINUS in red and PLUS in black

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