Contact lenses

Contact lenses

Contributors in Contact lenses

Contact lenses

Most older technology excimer laser machines employ different kinds of masks to customize, refine, and smooth the corneal surface. Many machines have an internal constricting diaphragm (like a camera ...

Concave lens

Eyewear; Optometry

A lens with a hollow shape like the inside surface of a ball. Concave lenses are minus power lenses and are used to correct myopia (nearsighted, shortsighted vision).

Prescription terms

Eyewear; Optometry

Medical prescription terms were originally all written in Latin. Many of the Latin terms continue to be used today. Eyeglass prescriptions are somewhat different, and you can learn about them at Read ...

Ischemia

Eyewear; Optometry

A decrease in the blood supply caused by constriction or obstruction of the blood vessels. J

Prism

Eyewear; Optometry

A prism is a lens that will bends light towards its base. Prisms are used to measure the angle of deviation in strabismus to correcting binocular polyopia when the eyes become misaligned in ...

Keloid

Eyewear; Optometry

An abnormal scaring of damaged tissue. See Keloid Details.

Binocular vision

Eyewear; Optometry

The blending of the separate images seen by each of two eyes into a single image. Normal binocular vision yields a stereoscopic image and parallax-induced depth perception.