Glasses

Glasses

Industry: Eyewear

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Glasses

sphere

Eyewear; Glasses

A part of your prescription. The sphere number denotes the strength of the lens in diopters.

temple length

Eyewear; Glasses

The length of the arm of the frame running from the hinge to the end that wraps behind your ear in Millimeters.

Pentax produces lenses that are thinner and lighter than they have ever been before, by using the highest index of refraction at 1.67, most advanced material. High prescriptions no longer mean thick, ...

presbyopia

Eyewear; Glasses

Inability to accommodate focus difference between distance vision and near (reading)

transitions lenses

Eyewear; Glasses

Photochromic lenses that transition from clear to dark in the presence of ultraviolet light and block 100% of harmful UV rays. Innovative photochromic technologies have produced unparalleled lens ...

trifocal

Eyewear; Glasses

Corrective eyewear lenses containing regions with three distinct optical powers. The three standard regions are distance at the top, intermediate in the middle and reading towards the bottom of the ...

ultraviolet (UV) radiation

Eyewear; Glasses

Invisible to the eye, prolonged exposure to solar UV radiation may result in acute and chronic health effects to the eyes. UVC rays are the highest energy, most dangerous type of ultraviolet light ...