71m/m
Semi-Finished:
Material: CR-39*
Base Curves:
2.00, 4.25, 6.25, 8.25, 10.25
Additions:
.50 thru 10.00
in .25 steps (ex. 1.25, 1.50, 1.75, 2.00)
Higher additions
available upon request
71 m/m (10.25 Base)
in .50 steps only
71 m/m Extra
Thick also available
Material: CR-39* Plastic Specific
Gravity: 1.32
Index of Refraction:
Abbe Value: 58
Note:*
Lens Actual Nominal Actual Back Sag Seg Seg
Style Size Curve Curve Curve 50m/m C.T. E.T. Inset Drop
Rd.-22 71m/m 2.00 2.00 2.25 1.191 11.2 11.5 0.0 12.5
Rd.-22 71m/m 4.25 4.25 6.25 2.573 9.0 10.4 0.0 12.5
Rd.-22 71m/m 6.25 6.25 6.25 3.864 8.2 11.5 0.0 12.5
Rd.-22 71m/m 8.25 8.25 6.25 5.240 10.8 11.5 0.0 12.5
Rd.-22 71m/m 10.25 10.25 6.25 ** ** ** ** **
Note:
*Over 10.00 Diopter addition
adds THICKNESS and changes ALL BACK CURVES to -2.25.
Note: **Information Not
Available At Press Time.