About 120 results for ‘Blindness’
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Blindness
Blindness is the condition of lacking visual perception due to physiological or neurological factors. Various scales have been developed to describe the extent of vision loss and define blindness. Total blindness is the complete lack of form and visual light perception and is clinically recorded as NLP, an abbreviation for "no light perception. " Blindness is frequently used to describe severe visual impairment with residual vision. Those described as having only light perception have no more sight than the ability to tell light from dark and the general direction of a light source. To determine which people may need special assistance because of their visual disabilities, various governmental jurisdictions have formulated more complex definitions referred to as legal blindness. In North America and most of Europe, legal blindness is defined as visual acuity (vision) of 20/200 (6/60) or less in the better eye with best correction possible. This means that a legally blind individual would have to stand 20 feet (6.1 m) from an object to see it—with corrective lenses—with the same degree of clarity as a normally sighted person could from 200 feet (61 m). In many areas, people with average acuity who nonetheless have a visual field of less than 20 degrees (the norm being 180 degrees) are also classified as being legally blind. Approximately ten percent of those deemed legally blind, by any measure, have no vision. The rest have some vision, from light perception alone to relatively good acuity. Low vision is sometimes used to describe visual acuities from 20/70 to 20/200. By the 10th Revision of the WHO International Statistical Classification of Diseases, Injuries and Causes of Death, low vision is defined as visual acuity of less than 20/60 (6/18), but equal to or better than 20/200 (6/60), or corresponding visual field loss to less than 20 degrees, in the better eye with best possible correction. Blindness is defined as visual acuity of less than 20/400 (6/120), or corresponding visual field loss to less than 10 degrees, in the better eye with best possible correction. Blind people with undamaged eyes may still register light non-visually for the purpose of circadian entrainment to the 24-hour light/dark cycle. Light signals for this purpose travel through the retinohypothalamic tract and are not affected by optic nerve damage beyond where the retinohypothalamic tract exits.
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J'APPORTE DE L'ARGENT ; (titre inscrit)
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- Field(s):
- Ethnology
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- Portrayed subject:
- Blindness
- Cage (enclosure)
- Clothing
- Conversation
- Credit (finance)
- Death
- …
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- Date:
- 18th century
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L'Aveugle / & le Paralytique (titre inscrit)
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- Portrayed subject:
- Arab people
- Blindness
- Clothing
- Dog
- Man
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- Date:
- 19th century
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Fanch koz - Eunn dra bennag d'ar paour keaz dall
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- Portrayed subject:
- Blindness
- Breton people
- Folk costume
- Man
- Porch
- Swagger stick
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- Date:
- 20th century
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- Artist(s):
- Jacques-Louis David
BELISAIRE DEMANDANT L'AUMONE
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- Portrayed subject:
- Belisarius
- Blindness
- Child
- City
- Serviceman
- Woman
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- Date:
- 18th century
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UNE SCENE DU MARCHE DES INNOCENTS
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- Field(s):
- Painting
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- Portrayed subject:
- Blindness
- Child
- Cucurbita maxima
- Dog
- Grape
- Individual
- …
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- Date:
- 19th century
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SAINT PAUL CONDUIT A DAMAS APRES SA CONVERSION
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- Field(s):
- Painting
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- Portrayed subject:
- Blindness
- Clothing
- Falling (accident)
- Hill
- Horse
- Paul the Apostle
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- Date:
- 17th century
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- Artist(s):
- Bon Boullogne
TOBIE GUERISSANT SON PERE
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- Field(s):
- Painting
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- Portrayed subject:
- Blindness
- Hill
- Meadow
- Swagger stick
- Tree
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- Date:
- 18th century
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Bélisaire aveugle ; Aveugle, Mendiant arabe (autre titre)
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- Field(s):
- Painting
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- Portrayed subject:
- Belisarius
- Blindness
- Clothing
- General officer
- Landscape
- Man
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- Date:
- 19th century
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BELISAIRE RECEVANT L'HOSPITALITE D'UN PAYSAN AYANT SERVI ...
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- Field(s):
- Painting
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- Portrayed subject:
- Belisarius
- Blindness
- Family
- Sitting
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- Date:
- 18th century
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- Artist(s):
- Jacques-Louis David
BELISAIRE DEMANDANT L'AUMONE ; BELISAIRE RECONNU PAR UN S...
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- Field(s):
- Painting
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- Portrayed subject:
- Belisarius
- Blindness
- Boy
- City
- Column
- General officer
- …
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- Date:
- 19th century
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- Artist(s):
- Pieter Brueghel the Younger
LA PARABOLE DES AVEUGLES
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- Field(s):
- Painting
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- Date:
- 16th century
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- Artist(s):
- Jean-Baptiste Hugues
OEDIPE A COLONE
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- Field(s):
- Sculpture
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- Portrayed subject:
- Bench (furniture)
- Blindness
- Colonus
- Nudity
- Sitting
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- Date:
- 19th century
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- Artist(s):
- Claude Michel
Homère mordu par les chiens
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- Field(s):
- Sculpture
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- Portrayed subject:
- Blindness
- Dog
- Homer
- Nudity
- Swagger stick
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- Date:
- 19th century
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- Artist(s):
- Léon Fagel
Le jeune Tobie rendant à la vue à son père
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- Field(s):
- Sculpture
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- Date:
- 19th century
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Dalila livre Samson aux Philistins
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- Field(s):
- Sculpture
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- Portrayed subject:
- Blindness
- Delilah
- Samson
- Serviceman
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- Date:
- 20th century
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