|
How do I figure out what this diopter is?
|
11
|
984
|
June 17, 2019
|
|
telescopes and binoculars
|
23
|
2021
|
September 1, 2000
|
|
How is this possible re bizarre optical behavior of mirror I bought
|
18
|
1512
|
April 29, 2004
|
|
How can I determine the magnifying power of my Glasses?
|
7
|
436
|
April 2, 2021
|
|
What metric lingo is used in describing eye defects?
|
13
|
1425
|
January 29, 2016
|