Optical Retinoscopy Rack Lens Set for rapid determination of spectacle diopter power , includes 2 bars with 32 spherical lenses .

Optical Retinoscopy Rack Lens Set for rapid determination of spectacle diopter power , includes 2 bars with 32 spherical lenses .

0.50D

1.00D

1.50D

2.00D

2.50D

3.00D

3.50D

4.00D

5.00D

6.00D

7.00D

8.00D

9.00D

10.00D

12.00D

15.00D

32 lenses in total ( 16 per bar ) , consisting of two bars — one for concave (-) lenses and one for convex (+) lenses ; the concave ( minus ) lenses are marked in red , and the convex (plus) lenses in black .

Spherical powers : +/- 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 .

Packaging : Includes a protective leather pouch .

Usage : Suitable for the rapid assessment of the dioptric power of eyeglasses .

Design : Safe and hygienic , constructed from eco-friendly materials with smooth edges and high-quality craftsmanship .