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Eyewear
Eyeglasses, goggles or other objects worn over the eyes, usually to aid vision or for protective purposes.
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Eyewear > Eye surgery 
hemeralopia
Eyewear; Optometry
Day blindness. Loss of one half of the visual field in one or both eyes. Often caused by clouding or opacity of one or more of the normally clear ocular tissues.
pinhole glasses
Eyewear; Optometry
Used in a diagnostic setting to differentiate whether reduced vision is secondary to uncorrected refractive error or to disease/amblyopia. By eliminating the peripheral light rays ...
higher order aberration (HOA)
Eyewear; Optometry
A common eye examination and refraction evaluates low order aberrations (LOA). These are commonly called sphere (myopia or hyperopia) and cylinder (astigmatism). Only a wavefront ...
humanitarian device exemption
Eyewear; Optometry
A Humanitarian Device Exemption from the Food and Drug Administration authorizes the use and marketing of a device that is intended to benefit patients in the treatment of ...
aphakic spectacles
Eyewear; Optometry
Thick, plus-powered eyeglasses that were once the standard correction for optical power following extraction of cataract. The glasses were cumbersome and greatly distorted ...
point spread function (PSF)
Eyewear; Optometry
Often used in wavefront diagnostic analysis. A single round spot of light becomes diffused when it passes through an aberrated element such as a human eye. Aberrations cause some ...
Sub-categories
- Contact lenses (3070)
- Eye surgery (2811)
- Glasses (802)
- Optometry (16172)
- Sunglasses (524)