diopter
1
8.9
- noun
- /daɪˈɒptər/
- Specialized
- A lens with a strength of two diopters is suitable for close-up tasks like reading.
- 20 diopters
- 30 diopters
Examples
-
We used a slit lamp or a torch and a 20-diopter magnifying loupe to examine the anterior segment of the eye.
Academic text (2009) -
Diopters are a unit of measurement of the strength of corrective lenses.
Academic text (2007) -
In addition, you can also get a clearer display effect through the diopter adjustment dial.
Blog text (7) -
Both of us, he found, needed lenses of identical strength, four diopters.
Fiction book (1994) -
Now I had extreme myopia: my prescription measured about -12 diopters in one eye and about -14 in the other.
Academic text (2007) -
Unfortunately, the conversion tables I could find on the Internet went only as far as "moderate myopia": -3 to -6 diopters.
Academic text (2007) -
I'd probably go for the X-E1; it is smaller, and unlike the X-Pro1, it has a diopter correction on the eyepiece.
Blog text (13) -
For many years, we have induced pseudophakic myopia of 5 diopters in our age-related macular degeneration (AMD) patients.
Blog text (31) -
To get higher magnification, use a Nikon 3T (3 diopters) and a Canon 500T 58mm close-up auxiliary lens.
Academic text (1999) -
To achieve clear vision with your binoculars, adjust the diopter according to your eyesight.
Surface Forms
Etymology
Diopter comes from Greek parts dia- ('through') and opt- ('to see'), the same root as in optics. So, a diopter tells how strong a lens is at bending light to help you see, which is why eye doctors use it for glasses.