65m/m Large Field Rd. 28m/m Bi-focals

 

Semi-Finished

Material: CR-39*

 

Base Curves:     14.00 Base

                                (58m/m Field Size/65m/m Blank Size)

 

Additions:

1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00, 5.50, 6.00, 6.50, 7.00, 7.50, 8.00, 8.50, 9.00 9.50, 10.00

Material CR-39* Plastic                                                                         Specific Gravity 1:32

Index of Refraction: 1.498                                                                    Round 28m/m Bi-focal

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

 

Note:* Note:**

 

Lens         Actual         Nominal      Actual             Back           Sag                                               Seg        Seg

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

Rd-28        58/65**             14.00         14.50               2.75       10.695         19.2             8.0               0.0        3.0

 

 

Note:** Higher Base has reduction in FIELD SIZE