Glasses

Glasses

Contributors in Glasses

Glasses

Most people start to suffer from vision deterioration around age 40. The eye's crystalline lens changes shape depending on the distance of the object being viewed. This lens elasticity deteriorates ...

Cylinder

Eyewear; Glasses

An indicator of astigmatism on your prescription. If there is no cylinder value on your prescription, you do not have astigmatism.

Eye size

Eyewear; Glasses

The horizontal measurement of the lens on any frame at its widest part. This measurement is measured in millimeters.

Diopter

Eyewear; Glasses

Unit of lens refractive power, equal to the reciprocal of the lens focus length in meters.

Color-coated lenses

Eyewear; Glasses

Lenses that have a colour coating applied to the outside of the lens.

Contrast

Eyewear; Glasses

The difference in brightness between the light and dark parts of an image. A higher contrast lens provides greater visual acuity.

Drivewear

Eyewear; Glasses

A type of lens that transitions behind the windshield of a car. This type of lens is specifically for driving. The lens shade will vary depending on exterior lighting conditions, but never turn ...