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Topic: Blindness

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In the News (Fri 22 Mar 19)

 Blindness Encyclopedia @ Encyclopedia.LocalColorArt.com (Local Color Encyclopedia)   (Site not responding. Last check: 2007-10-22)
This means that a legally blind individual would have to stand 20 feet from an object to see it with the same degree of clarity as a normally sighted person could from 200 feet.
Blindness is defined as visual acuity of less than 3/60, or corresponding visual field loss to less than 10 degrees, in the better eye with best possible correction.
An eye which is accompanied by a limitation in the fields of vision such that the widest diameter of the visual field subtends an angle no greater than 20 degrees shall be considered for purposes of the first sentence of this subsection as having a central visual acuity of 20/200 or less.
encyclopedia.localcolorart.com /encyclopedia/Blindness   (1255 words)

 Encyclopedia of Cognitive Science: Change Blindness
Change blindness is a phenomenon in visual perception in which very large changes occurring in full view in a visual scene are not noticed.
Change blindness, in addition to links with research on visual short term memory, also has relations with several more recent lines of research showing that attentional capacity in short term visual processing is severely limited, both in spatial extent, and in the way it extends over time.
In change blindness paradigms using local disruptions, the situation is very similar, with the difference that the local transient corresponding to the change location is missed by observers, not because it is swamped by a global transient, but because the mudsplashes act as "decoys", attracting attention to locations other than the true change location.
nivea.psycho.univ-paris5.fr /ECS/ECS-CB.html   (3318 words)

 Talk:Color blindness - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-22)
On the other hand, "Color blind hunters are better at picking out prey against a confusing background, and the military have found that color blind soldiers can sometimes see through camouflage that fools everyone else." Appears to be valid, if anyone was wondering (I was) http://www.hubmed.org/display.cgi?uids=1354367.
So perhaps in red-green color blindness you simply lose the "red versus green" dimension, and now all the complicated light spectrum input is being degraded into only one color dimension: the "blue versus anything else".
This article originally stated that roughly 1/12 of the population of Pohnpei suffers from achromatopsia; in actuality, it is the island of Pingelap, which is located 180 miles from Pohnpei and is a part of the Pohnpei State, that has this rate.
www.ourlocalcolor.com /encyclopedia/Talk:Color_blindness   (9546 words)

 MedlinePlus Medical Encyclopedia: Blindness
Blindness is the lack of vision, or a loss of vision that cannot be corrected with glasses or contact lenses.
Worldwide, the leading causes of blindness are cataracts, onchocerciasis (river blindness), trachoma, leprosy, and vitamin A deficiency.
It is important for a blind person to be able to dress, eat, function independently, and stay safe.
www.nlm.nih.gov /medlineplus/ency/article/003040.htm   (433 words)

 NBC10.com - Health Encyclopedia - Optic Glioma
The symptoms are due to the tumor growing and pressing on the optic nerve and adjacent structures.
Vision loss in one or both eyes that leads to eventual blindness.
The vision loss can be general, or it can be a decrease in the visual fields, such as a loss of peripheral vision.
www.nbc10.com /encyclopedia/6861395/detail.html   (919 words)

 word blindness - Hutchinson encyclopedia article about word blindness
Organic diseases of the brain, such as stroke, can result in word blindness, whilst the person often retains the ability to spell the word.
It may also be used as another name for dyslexia.
This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
encyclopedia.farlex.com /word+blindness   (107 words)

Blind at the ago of 20, Sposeto went on to become a criminal trial lawyer, and weaves a tale of intrigue, mystery and advocacy in this thrilling memoir.
The golden retriever then moves on to more preparation with to become a guide dog, and is eventually paired with a blind man. The author keeps the focus tightly on this animal and the people around him, but manages to slip in an extraordinary amount of information about the raising and training of guide dogs.
She brings life to the narrative through details-Ira learning to ride the bus, for example, and practicing the proper way to enter an elevator so that it won't close on his leash.
www.guidedogsofamerica.org /books.html   (521 words)

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