65m/m or 71 m/m Rd. 22m/m Bi-focal

 

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 thru 20.00 in .25 steps(example:.50, .75, 1.00, 1.25 etc.)

 

 Higher additions available upon request

 

We have made as high as a 50.00 diopter in a 6.25 base with the seg size finishing at 20m/m wide.

 

 

 

Material CR-39* Plastic                                                                        Specific Gravity 1:32

Index of Refraction: 1.498                                                                 Round 22m/m Bi-focal

Abbe Value: 58                                                                                         65m/m & 71 m/m

 

Note:* All Note:**

 

Lens         Actual            Nominal    Actual          Back        Sag                                               Seg            Seg

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

 


Rd-22       65m/m            Plano          0.00              2.25          0.00        12.3          14.3              0.0        5.5

Rd-22       65m/m               2.00          2.00              2.25        1.191        10.8          11.4              0.0        5.5

Rd-22       65m/m               4.25          4.25              6.25        2.573          9.4          10.4              0.0        5.5

Rd-22       65m/m               6.25          6.25              6.25        3.864          8.0            7.4              0.0        5.5

Rd-22       65m/m               8.25          8.25              6.25        5.240        10.5            7.8              0.0        5.5

Rd-22       65m/m            10.25        10.25              6.25        6.742        12.5            7.0              0.0        5.5

Rd-22       65m/m            12.00        12.00              6.25        8.207        15.4            7.2              0.0        5.5

Rd-22       58/65**          14.00        14.50              2.25     10.695        19.2            8.0              0.0        5.5

Rd-22       52/65**          16.00        16.50              2.25     13.307        18.2            8.0              0.0        5.5

Rd-22       46/65**          18.00        18.50              2.25     17.392        17.4            8.0              0.0        5.5

Rd-22       71m/m               2.00          2.00              2.25        1.191        11.2          11.5              0.0        5.5

Rd-22       71m/m               4.25          4.25              6.25        2.573          9.0          10.4              0.0        5.5

Rd-22       71m/m               6.25          6.25              6.25        3.864          8.2            7.4              0.0        5.5

Rd-22       71m/m               8.25          8.25              6.25        5.240        10.8            7.4              0.0        5.5

Rd-22       71 m/m           10.25        10.25              6.25        6.742        17.2          11.5              0.0        5.5