This 266pcs trial lens set is very useful for optometrist, vision testers or household use. It containing with 266pcs of lenses, including 160 spherical lenses, 80 cylindrical lenses,12 prisms, and 12 accessories.
Specification
Spheres: 40 pairs each of concave and convex
0.25D to 6.00D in 0.25 steps
6.50D to 10.00D in 0.50 steps
11.00D to 15.00D in 1.00 steps
16.00D to 20.00D in 2.00 steps
Cylinders: 20 pairs each of concave and convex
0.25D to 4.00D in 0.25 steps
4.50D to 6.00D in 0.50 steps
Prisms: 12 pieces
0.5(2);1.0-10.0(1)
Accessories:14 pieces
RF,GF,BL,FL (1) PL,MR,SS,CL,PH (2)
Cross cylinder: 0.25(1), 0.5(1)