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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 > Optometry 
alignment reference marking
Eyewear; Optometry
Permanent markings provided by the manufacturer to establish the horizontal alignment of the lens or lens blank, or to reestablish other reference points.
antireflection coating
Eyewear; Optometry
Coating on the surface of a lens intended to reduce light reflected from its surfaces.
apical angle
Eyewear; Optometry
Angle included between the refracting surfaces and which is contained in a principal section of a prism.
aspheric lens
Eyewear; Optometry
Lens in which at least one surface deviates from a spherical shape.
aspherical surface
Eyewear; Optometry
Part of a surface of revolution having continuously variable curvature from the vertex to the periphery.
coated lens
Eyewear; Optometry
Lens to which one or more surface layers have been added to alter one or more properties of the lens.
Sub-categories
- Contact lenses (3070)
- Eye surgery (2811)
- Glasses (802)
- Optometry (16172)
- Sunglasses (524)