Contact lenses

Contact lenses

Industry: Eyewear

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Transition zone

Eyewear; Optometry

The area of laser ablation that changes for the full correction of the central ablation zone optical ablation zone to the original surface depth of the cornea.

Cyclotorsion

Eyewear; Optometry

When eyes rotate clockwise or counterclockwise. This often occurs when a person changes from vertical (standing or sitting up) to horizontal (lying down) position.

Corrective lenses that have three powers of correction. Typically the majority of the lens is corrected for distance vision while a small area is corrected for near vision and another small area is ...

Ultrasound

Eyewear; Optometry

Procedures using sound waves to measure certain portions or detect abnormalities within the eye. See A Scan and B Scan.

Decentration

Eyewear; Optometry

A complication of refractive surgery. In perfect centration, the centre of the corneal ablation exactly coincides with the centre of the visual axis and/or pupil. This is like looking through the ...

Refractive lens exchange (RLE)

Eyewear; Optometry

Refractive Lens Exchange (RLE), also known as Clear Lens Exchange (CLE), is essentially cataract surgery without the cataract. The crystalline lens is removed from the eye and replaced with a clear ...

Lattice degeneration

Eyewear; Optometry

Lattice degeneration is a hereditary vitreoretinal degeneration of the retina, causing holes most often in the periphery and possibly leading to retinal detachment. Lattice is a commonly a ...