Glare
Glare
Glare (/ɡlɛər/) is the discomfort or impairment of vision caused by excessive brightness, typically from sunlight or artificial light sources.
Etymology
The term "glare" originates from the Middle English word 'glaren' or 'gleren' (to shine, gleam), which is akin to the Old English 'glær' for amber, and the Old High German 'glaren' to glare.
Definition
Glare is a visual sensation caused by excessive and uncontrolled brightness. It can be disabling or simply uncomfortable. It is subjective, and sensitivity to glare can vary widely. Older people are usually more sensitive to glare due to the aging characteristics of the eye.
Types of Glare
There are two types of glare:
- Disability Glare - This type of glare impairs the vision of objects without necessarily causing discomfort. This could arise from a car's headlights at night, or a bright window in the line of vision.
- Discomfort Glare - This type of glare causes discomfort without necessarily impairing the vision of objects.
Related Terms
- Brightness - The attribute of visual perception in accordance with which an area appears to emit more or less light.
- Light - Electromagnetic radiation that can be detected by the human eye.
- Vision - The faculty or state of being able to see.
- Photophobia - Extreme sensitivity to light, causing discomfort or pain in the eyes.
See Also
External links
- Medical encyclopedia article on Glare
- Wikipedia's article - Glare
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