Dioptre

/daɪˈɑːptər/

Definition 1 of 2

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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.

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Positive and Negative

Positive dioptres for farsightedness; Negative for nearsightedness.

Illustration for Positive and Negative

She needs glasses with +3.0 dioptres to read.

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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"

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