Dioptre

usgb/daɪˈɑːptər/
noun

The unit of measurement used to describe the power of a lens, such as a glasses or telescope lens.

My glasses have a power of -2.5 dioptres, which means I'm nearsighted.
Visual representation of "dioptre" - The unit of measurement used to describe the power of a lens, such as a glasses or telescope lens.

Often appears as...

  • optical dioptre
  • lens power in dioptres

Usage tips

Technical

Definition 1 of 2
Visual representation of "dioptre"
LampPro Tip 1/3

Vision Correction

Used to specify the correction strength needed for eyeglasses or contact lenses.

Illustration for Vision Correction
My prescription reads -1.75 dioptres in my left eye.
LampPro Tip 2/3

Positive and Negative

Positive dioptres for farsightedness; Negative for nearsightedness.

Illustration for Positive and Negative
She needs glasses with +3.0 dioptres to read.
LampPro Tip 3/3

Precision Matters

A small change in dioptres can significantly affect vision clarity.

Illustration for Precision Matters
I need to update my lenses to 0.25 dioptres stronger.
Visual representation of the word "Dioptre"

Never forget "Dioptre"

Humans forget easily. That's why you should download WordUp: Smart reminders, word games, AI practice, and much more!

Download on the App StoreGet it on Google PlayGet it from MicrosoftGet it on AppGallery
Chrome

WordUp Chrome Extension

As you browse the web instantly look up words you don’t know.

Get Chrome Extension
Back to top