Blind
Blind
Blind (pronunciation: /blaɪnd/), from the Old English blind, meaning "unable to see", is a term used to describe a condition where an individual lacks visual perception due to physiological or neurological factors.
Definition
Blindness is the state of being sightless. A blind individual is unable to see. In a strict sense, the term "blind" refers to the inability to see because of injury, disease, or a congenital condition. In a broader sense, it can also refer to a lack of awareness or understanding.
Causes
Blindness can be caused by a number of factors, including but not limited to:
- Glaucoma: A condition that damages the eye's optic nerve. It gets worse over time and often leads to blindness.
- Macular Degeneration: A medical condition which may result in blurred or no vision in the center of the visual field.
- Diabetic Retinopathy: A diabetes complication that affects eyes and can cause blindness.
- Cataract: A clouding of the lens in the eye that affects vision.
Related Terms
- Visual Impairment: A decreased ability to see to a degree that causes problems not fixable by usual means, such as glasses or medication.
- Low Vision: A condition caused by eye disease, in which visual acuity is 20/70 or poorer in the better-seeing eye and cannot be corrected or improved with regular eyeglasses.
- Legal Blindness: A level of visual impairment that has been legally defined to determine eligibility for benefits.
See Also
- Braille: A tactile writing system used by people who are visually impaired.
- Guide Dog: A trained dog to guide blind people around obstacles.
External links
- Medical encyclopedia article on Blind
- Wikipedia's article - Blind
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski