71 m/m Ultex 48m/m Bi-focal

 

Semi-Finished:

Material: CR-39*

 

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

 

 (Other additions also available)

 

12m/m Edge Extra Thick also available

 

 

Material: CR-39* Plastic                                                                    Specific Gravity: 1.32

index of Refraction: 1.498                                                                   71m/m Ultex 48m/m

Abbe Value: 58                                                                                                      Bifocal

 

Lens                       Actual  Nominal    Actual      Back           Sag                                                Seg        Seg

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

Ultex 48m/m        71m/m     2.00            2.00        2.25        1.191        11.2          11.5              0.0        3.0

Ultex 48m/m        71m/m     4.25            4.25        2.25        2.573          9.0          11.5              0.0        3.0

Ultex 48m/m        71m/m     6.25            6.25        6.25        3.864          8.2          11.5              0.0        3.0

Ultex 48m/m        71m/m     8.25            8.25        6.25        5.240        10.8          11.5              0.0        3.0

Ultex 48m/m        71m/m  10.25          10.25        6.25                *              *                *

 

Note: *Information Not Available at Press Time.