65m/m Minus Front Base Rd. 28m/m (Extra Thick)
Semi-Finished
Material: CR-39*
Edge
Thickness: Approx. 21 m/m
Base Curve: -3.00
Additions:
1.00, 1.50, 2.00, 2.50, 3.00,
3.50, 4.00, 4.50, 5.00
5.50, 6.00, 6.50, 7.00, 7.50,
8.00, 8.50, 9.00, 9.50, 10.00
Base Curve: -6.25 & -8.25
Additions:
1.00, 1.50, 2.00, 2.50, 3.00,
3.50, 4.00, 4.50, 5.00
5.50, 6.00, 6.50, 7.00, 7.50,
8.00, 8.50, 9.00, 9.50, 10.00
(other
additions please call for quotation)
Material: CR-39* Plastic Specific
Gravity: 1.32
Index of Refraction: 1.498 Minus Front Base
Abbe Value: 58 65m/m
Single Vision
Round
22m/m Bi-focal
Round
25m/m Bi-focal
Round
28m/m Bi-focal
MINUS FRONT BASE
Single Vision, Rd. 22, Rd. 25, Rd. 28m/m
EXTRA THICK
Lens Actual Nominal Actual Back Sag Seg Seg
Style Size Curve Curve Curve 50m/m C.T. E.T. Inset Drop
S.V. 65m/m
-2.75 -2.87 2.25 -1.722 17.2 22.0 S.V. S.V.
S.V. 65m/m -4.50 -4.75 2.25 -2.890 15.6 22.0 S.V. S.V.
S.V. 65m/m -6.25 -6.50 2.25 -3.829 13.4 22.0 S.V. S.V.
S.V. 65m/m -8.25 -8.62 2.25 -5.511 11.6 22.0 S.V. S.V.
S.V. 65m/m -10.25 -10.62 2.25
-7.042 11.8 24.0 S.V. S.V.
Bif. 65m/m -3.00
-3.12
2.25 -1.831 17.0 22.0 0.0
4.0
Bif. 65m/m
-6.25 -6.50 2.25 -3.829 13.4 22.0 0.0 4.0
Bif. 65m/m
-8.25
-8.62
2.25 -5.511 12.0 22.0 0.0
4.0