Perimeter

Perimeter

Instrument to assess differential light sensitivity in the visual field by detection of the presence of test stimuli on a defined background.

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Part of Speech: noun
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Industry/Domain: Eyewear
Category: Optometry
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Related terms

perimeter

Software; Image processing

In image processing, the number of pixels in the border of a region.

perimeter

Eyewear; Optometry

Instrument to assess differential light sensitivity in the visual field by detection of the presence of test stimuli on a defined background.

perimeter

Military; Arms control

External boundary of the inspection site, defined by either geographic coordinates or description on a map.

perimeter

Mathematics; Geometry

The distance around the outside of an area or a flat figure. The perimeter of a circle is its circumference.

perimeter

Agriculture; Rice science

Around the edge, outside border.

perimeter

Sports; Basketball

(basketball term) the area beyond the foul circle away from the basket, including 3-point line, from which players take long-range shots.

ophthalmoscope

Eyewear; Optometry

An optical instrument used to examine the external and internal parts of the eye, particularly the media and the fundus.

pantoscopic angle

Eyewear; Optometry

1. Angle in the vertical plane between the optical axis of a spectacle lens and the visual axis of the eye in the primary position, usually taken to be the horizontal. 2. Angle ...

optical material

Eyewear; Optometry

Transparent material capable of being manufactured into optical components.

optical radiation hazard

Eyewear; Optometry

Possibility of damage to the retina by optical radiation.

optical centre

Eyewear; Optometry

For practical purposes, the intersection of the optical axis with the front surface a lens.

ophthalmoscope

Optometry; Optometry

An optical instrument used to examine the external and internal parts of the eye, particularly the media and the fundus.

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