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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 
fitting point
Eyewear; Optometry
That point on the front surface of a lens or semifinished lens blank stipulated by the manufacturer as a reference point for positioning the lens in front of the eye.
fitting height
Eyewear; Optometry
Distance between the lower rim of the frame and the pupil centre in the zero gaze direction.
field of illumination
Eyewear; Optometry
The angular field which is illuminated and which is measured with its apex positioned at the image of the light source.
distance reference point
Eyewear; Optometry
That point on the front surface of the lens at which the dioptric power for the distance portion apply.
distance visual point
Eyewear; Optometry
Assumed position of the visual point on a lens which is used for distance vision under given conditions.
diverging lens
Eyewear; Optometry
Lens which causes parallel incident light to diverge from a virtual focus. Also known as minus-power lens.
dividing line
Eyewear; Optometry
Boundary between two adjacent portions of a multifocal or lenticular lens.
Sub-categories
- Contact lenses (3070)
- Eye surgery (2811)
- Glasses (802)
- Optometry (16172)
- Sunglasses (524)