Slab Off Here We Go

[ammoe2]

:idea:

oK gUYS, Now that you have answered the doctors, and my, question about reading lenses with a lens clock.

We need to know how to read slab off with a lens clock.

any help would be great.

thanks So much!!

Amy

[CME4SPECS]

Measure the curve vertically in the distance, on the surface of the slab. Then put the center pin of clock on the slab line, place one pin in the distance portion and the other in the reading. The difference between the two measurements is the amount of slab prism. Terry Agin