Optometry

Optometry

A health care profession concerned with eyes and related structures, as well as vision, visual systems, and vision information processing in humans. The practice of eye and vision care.

Industry: Eyewear; Health care

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Optometry

mean reflectance

Eyewear; Optometry

Mean value of the spectral reflectance over a wavelength range 400nm to 700nm, giving a physical rather than a visual quantification of the surface reflection.

The ratio of the viewing angle of an object when observed through a magnifying system with the image at infinity to that of the object when observed by the naked eye at a reference viewing distance ...

magnifier

Optometry; Optometry

Lens system designed to produce an enlarged image by relative distance magnification. It may be a simple single element or compound multiple element system.

magnification of photography

Optometry; Optometry

Ratio of the size of the image on the photosensitive target to that of the fundus at the centre of the photographic field, assuming that the eye is emmetropic and that it has a focal length of 17 mm ...