👁️ Lens for astigmatism 🔢 Torus-like math object

toric

1 8.4

Shaped like a ring with a hole in the middle or describing a lens for an irregular eye shape

adjective
/ˈtɔrɪk/

Specialized

: tórico

The toric shape of the lens allows for clearer vision at multiple distances.

Examples

My optometrist prescribed toric lenses to help correct my astigmatism.
Now I've got my new toric lenses in which cater to astigmatism and they're I guess weighted.
This is a Seva vision toric focus, focus toric I think.
She found that wearing toric lenses significantly improved her visual clarity.

Synonyms

toroidal

vstoric

Specialized

2 9.9

Having a doughnut shape like a ring

also refers to lenses with differing curvatures to correct astigmatism

Surface Forms

toric positive

Morphology

toric = torus (transparent) = torus + ic

Formed by the noun 'torus' plus the productive adjectival suffix '-ic', so the relation to a torus-shaped object or property is direct.

Etymology

The word toric comes from the root torus, which originally meant a 'cushion' and today often brings to mind a 'donut' shape. That's why toric lenses have different curves to correct astigmatism.