65m/m or 71 m/m Rd. 25m/m Bi-focals
Semi-Finished
Material: CR-39*
Base Curves:
Additions: .50-20.00 Available in .25 Steps (ex. 1.25, 1.50,
1.75, 2.00)
(Higher
Adds may be available)
Also available in 65m/m Extra Thick 15m/m
Edge and 65m/m Extra Thick 22m/m
Edge
Material CR-39* Plastic Specific
Gravity
Index of Refraction: 1.498 Round
25m/m Bi-focal
Abbe Value: 58 65m/m
& 71 m/m Blanks
Lens Actual Nominal Actual Back Sag Seg Seg
Style Size Curve Curve Curve 50m/m C.T. E.T. Inset Drop
Rd-25 65m/m
Rd-25 65m/m 2.00 2.00 2.25 1.191 10.8 11.5 0.0 4.5
Rd-25 65m/m
4.25 4.25 6.25 2.573 9.4 11.5 0.0 4.5
Rd-25 65m/m
6.25 6.25 6.25 3.864 8.0 11.5 0.0 4.5
Rd-25 65m/m
8.25 8.25 6.25 5.240 10.5 11.5 0.0 4.5
Rd-25 65m/m
10.25 10.25 6.25 6.742 12.5 11.5 0.0 4.5
Rd-25 65m/m
12.00 12.00 6.25 8.207 15.4 11.5 0.0 4.5
Rd-25 71m/m 2.00 2.00 2.25 1.191 11.2 11.5 0.0 4.5
Rd-25 71m/m
4.25 4.25 6.25 2.573 9.0 11.5 0.0 4.5
Rd-25 71m/m
6.25 6.25 6.25 3.864 8.2 11.5 0.0 4.5
Rd-25 71m/m 8.25 8.25 6.25 5.240 10.8 11.5 0.0 4.5
Rd–25 71m/m
10.25 10.25 6.631 13.2 11.5 0.0 4.5