We, the optician’s are always having troubles to explain to
customers about different types of lens indexes. There are some displays which can
show to the patient about various thickness according to different index
selection. Most of the time it will work fine. But as you know, thickness will
vary according to the diameter too. And most of us need to have a diameter
chart in hand to check the diameter.
Here, I am giving you a small excel file which will help you
to fine out the minimum required diameter...
This excel sheet has three sections, and the third section
will help you to find the diameter with simple steps
The first section will help you to find the thickness of a
lens according to its index and diameter.
And the second section will help you to have an idea to
compare the thickness difference between CR-39 and other index (it will show in
percentage)
click the above link and got to the menu file>download
Let me have your feedback and suggestions…
