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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
  • Synonym(s):
  • Blossary:
  • 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.

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

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

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Around the edge, outside border.

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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
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Transparent material capable of being manufactured into optical components.

optical radiation hazard
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Possibility of damage to the retina by optical radiation.

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

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

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