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Health care
Of or pertaining to the prevention and treatment of illness, and the preservation of physical and mental well-being, through the services provided by medical professionals.
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Health care > Optometry 
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.
ophthalmoscope graticules
Eyewear; Optometry
Patterns or targets or graticules which can be optionally positioned in the illuminating light path within the instrument and which will be imaged on the retina for diagnostic, ...
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