71 m/m Ultex 42m/m Bi-focal

 

Semi-Finished:

Material: CR-30*

 

Base Curves: 2.00, 4.25, 6.25, 8.25, 10.25

 

Additions: .50, .75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00, 3.25, 3.50, 3.75

 

Higher additions available upon request

 

EXTRA THICK AVAILABLE UPON REQUEST

 

 

Material: CR-39* Plastic                                                              Specific Gravity: 1.32

Index of Refraction: 1.498                                                             71m/m Ultex 42m/m

Abbe Value: 58                                                                                               Bi-focal

 

Lens               Actual   Nominal    Actual       Back           Sag                                               Seg       Seg

Style               Size        Curve         Curve     Curve       50m/m         C.T.           E.T.           Inset     Drop

Ultex 42m/m   71m/m        2.00             2.00         2.25         1.191         11.2           11.5               0.0        5.0

Ultex 42m/m   71m/m        4.25             4.25         2.25         2.573           9.0           10.4               0.0        5.0

Ultex 42m/m   71m/m        6.25             6.25         6.25         3.864           8.2           10.4               0.0        5.0

Ultex 42m/m   71m/m        8.25             8.25         6.25         5.240         10.8           10.4               0.0        5.0