65m/m or 71m/m (Round) Tri-focal 7x22x36

(7 is intermediate, 22 is segment, 36 is total)

Semi-Finished:

Material: CR-39

Base Curves: 2.00, 4.25, 6.25, 8.25, (10.25, 12.00, 14.00)

                                                                        (12.00 & 14.00 only in 65m/m)

 

Additions: 2.00 thru 16.00 in .50 steps (higher available upon request)

              

 

Also Available in:    65m/m Extra Thick 15m/ Edge

                                65m/m Extra Thick 22m/m Edge                        

 

 

Material: CR-39* Plastic                                             Specific Gravity: 1.32

Index of Refraction: 1.498                                   Round 7m/m-22m/m-36m/m

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

 

 

                                  TRI-FOCAL Note: *

 

Lens         Actual        Nominal      Actual            Back           Sag                                                Seg        Seg

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

 


Rd-Tri      65m/m               2.00          2.00              2.75        1.191        10.8          11.4              0.0        3.5

Rd-Tri      65m/m               4.25          4.25              2.75        2.573        13.0          11.5              0.0        3.5

Rd-Tri      65m/m               6.25          6.25              2.75        3.864        11.6          11.5              0.0        3.5

Rd-Tri      65m/m               8.25          8.25              2.75        5.240        13.8          11.5              0.0        3.5

Rd-Tri      65m/m            10.25        10.25              2.75        6.742        16.0          11.5              0.0        3.5

Rd-Tri      65m/m            12.00        12.00              6.25        8.207        15.0          11.5              0.0        3.5

Rd-Tri      60/65             *14.00        14.50              2.75     10.417        19.0          11.5              0.0        2.5

 

Rd-Tri      71 m/m              2.00          2.00              2.25        1.191        11.2          11.5              0.0        3.0

Rd-Tri      71 m/m              4.25          4.25              2.25        2.573        13.8          11.5              0.0        3.0

Rd-Tri      71 m/m              6.25          6.25              6.25        3.864                          11.5              0.0        3.0

Rd-Tri      71 m/m              8.25          8.25              6.25        5.240                          11.5              0.0        3.0

Rd-Tri      71 m/m           10.25        10.25              6.25                                            11.5              0.0        3.0

 

Note: * 14.00 Base has reduction in FIELD SIZE.