65m/m or 71 m/m Rd. 25m/m Bi-focals

 

Semi-Finished

Material: CR-39*

 

Base Curves: Plano, 2.00, 4.25, 6.25, 8.25, 10.25, 12.00 (Plano and 12.00 not available in 71m/m)

 

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 1:32

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            Plano          0.00              2.25          0.00        12.3          14.3              0.0        4.5

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