Noun

Wikipedia has an article on: Blindness

Singular blindness

Plural usually uncountable; plural blindnesses

blindness (usually uncountable; plural blindnesses)

  1. The condition of being blind; unable to see.
  2. (figuratively) Want of intellectual or moral discernment; mental darkness; ignorance, heedlessness.
  3. (obsolete) concealment

Synonyms

Derived terms

From Wiktionary under the GNU Free Documentation License.
Sun Jul 18 10:07:14 2010

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.

In order 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, so a damaged optic nerve beyond where the retinohypothalamic tract exits it is no hindrance.

From Wikipedia under the GNU Free Documentation License
Wed Jul 28 17:08:32 2010

Turkey slams " blindness " on Israel atomic bombs | Campaign Against ...
campaigniran.org
Turkey slams " blindness " on Israel atomic bombs | Campaign Against ...

http://www.campaigniran.org/casmii

ue, 29 Jun 2010 18:47:41 GM

Turkish Prime Minister Recep Tayyip Erdogan has slammed what he described as ". blindness. " on Israel's nuclear arsenal against an international concerted action over Iran's nuclear program. Turkey often calls for "fair" stance from global ...

NeuroLogica Blog Change Blindness
theness.com
NeuroLogica Blog Change Blindness

Steven Novella

Fri, 18 Jun 2010 11:39:10 GM

Here are some fun examples of a what neuroscientists​ call change . blindness. . First from Richard Wiseman the color changing card trick. And here is a great one from Derren Brown. Failure to notice one person being swapped for another ...

Woodruff Health Sciences Center | Emory University | Atlanta, GA ...
shared.web.emory.edu
Woodruff Health Sciences Center | Emory University | Atlanta, GA ...

unknown

ue, 29 Jun 2010 05:00:00 GM

Emory Eye Center has received a one-year departmental grant for $1000 from Research to Prevent . Blindness. (RPB). The grant will help support research into the causes, treatment and prevention of blinding diseases.

From Google Blog Search: "blindness"
Sat Jul 17 05:04:06 2010

See also:

  • The VoiceThe Voice
    visualprosthesis.com
    Translates images from a camera into sounds that one hears via stereo headphones and targetting vision substitution for the totally blind.

  • Recording For The Blind and DyslexicRecording For The Blind and Dyslexic
    rfbd.org
    Educational library for people with print disabilities, with a 77,000-title library of taped textbooks, reference and professional materials for people who cannot read standard print because of a disability.
  • SeebyTouchSeebyTouch
    see-by-touch.sourceforge.net
    The free of charge project, especially for the blind, provides a possibility to perceive pictures over the tactile sense - consisting of a picture transforming multi-platform software and a tactile display, built up easily with help of the construction manual.
Custom search only blindness sites:

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Thu Jul 29 06:53:17 2010
Blind? NE Texas man convicted in VA benefits - Houston Chronicle
chron.com
Blind? NE Texas man convicted in VA benefits - Houston Chronicle
Fri, 02 Jul 2010 13:24:19 GMT+00:00
? NE Texas man convicted in VA benefits Houston Chronicle 2010 ap texarkana, Texas A federal jury in Texarkana has convicted a Mount Pleasant man of fraud over decades of veterans benefits for blindness . ... Jury finds man guilty of fraud Texarkana Gazette Texas Vet Who Received Decades Of Benefits Convicted Of Fraud kwtx
A Culture in Denial Cannot Be Healed - Catholic Culture
catholicculture.org
A Culture in Denial Cannot Be Healed - Catholic Culture
Tue, 13 Jul 2010 20:35:18 GMT+00:00
Catholic Culture Such blindness is very common in our culture today, but it is fairly clearly a willful blindness , a blindness born of a fear that if we find a reason to ...
Implementation of the Affordable Care Act Must Lead to Adequate Diabetes Screening - SYS-CON Media (press release) (blog)
sys-con.com
Implementation of the Affordable Care Act Must Lead to Adequate Diabetes Screening - SYS-CON Media (press release) (blog)
Thu, 15 Jul 2010 00:50:58 GMT+00:00
SYS-CON Media (press release) (blog) If left untreated, diabetes leads to costly and dangerous complications such as blindness , amputation, heart disease, and kidney disease. ...

From Google News Search: "blindness"
Sat Jul 17 05:04:05 2010

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James Franco co stars as the surgeon s estranged son Nights in Rodanthe is available on DVD and Blu ray Blindess An epidemic in an unnamed city causes most people to go blind collapsing society The story follows a doctor

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dvdbelgorama.wifeo.com
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Duree 120 minutes Bonus

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You have no idea how much this picture makes me giggle When an actor signs themselves over to a director like Fernando Meirelles who made the exquisite City of God and the far less

From Yahoo Image Search: "blindness"
Thu Jul 29 08:39:34 2010

What kind of mutation is color blindness?
Q. I am doing a science project on color blindness and I need to know what kind of mutation it is like negative, positive, or neutral mutation. Links would be helpful or any info.
Asked by Ash Cash - Thu Dec 4 17:51:01 2008 - - 2 Answers - 0 Comments

A. In a normal, natural enviornment, color blindness would be neutral. With a person in society, it would be negative.
Answered by We Are - Thu Dec 4 18:15:38 2008

Are people that are affected with color blindness allele considered carriers?
Q. So lets say that X- is the affected gene. I know that XX- would be a carrier for the color blindness gene. I also know that a person with X-X would be affected by color blindess but would they be considered as a carrier too?
Asked by Jeri - Sun Dec 6 17:06:06 2009 - - 1 Answers - 0 Comments

A. Usually, the term "carrier" refers to a female heterozygous for a sex-linked trait. A less common usage is any heterozygote (at least, that's the way it used to be).
Answered by Asst Prof - Sun Dec 6 17:18:43 2009

If you were to suffer from any one of four psychological cases involving blindness and sight, or phantom limbs?
Q. If you were to suffer from any one of four psychological cases involving blindness and sight, or phantom limbs and pain, what would you do?
Asked by nguyen n - Thu Oct 9 03:45:00 2008 - - 1 Answers - 0 Comments

A. i would hate to not see but you cant let that stop you got to keep living
Answered by SeanBetter - Thu Oct 9 04:16:18 2008

From Yahoo Answer Search: "blindness"
Sat Jul 17 05:04:05 2010

From Wikiquote under the GNU Free Documentation License.
Tue Mar 2 06:28:04 2010