What is the relationship between the optical lens focal length and the number used by optholmic doctors?

Posted on July 31, 2009 by admin

all optical lens used in eyelens are specified by number i.e -1,+1,-2,+2 etc, I want to know how this number is related with focal length of optical lens

I think a diopter is a reciprocal meter.

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One Response to What is the relationship between the optical lens focal length and the number used by optholmic doctors?

  1. jondalar469 says:
    July 31, 2009 at 1:39 pm

    I think a diopter is a reciprocal meter.
    References :