Blindness

Common Name(s)

Blindness

Blindness is the complete or partial loss of vision, also known as vision impairment. In the United States, legal blindness is defined as vision that is worse than 20/200, or vision loss that cannot be corrected using glasses or contact lenses. It can be caused by a number of eye conditions and diseases such as diabetes, glaucoma, cataracts, stroke, and birth complications. Head injuries, injuries to the eye and exposure to certain chemicals and toxins may also cause blindness. In underdeveloped countries, the leading causes include chlamydia (a sexually transmitted disease pregnant mothers can catch and pass down to their newborns), river blindness, and leprosy. It is important to note that 80% of all blindness is preventable or curable, as in cases caused by diabetes or chlamydia.

Blindness includes both partial vision loss, meaning difficulty with vision, or complete vision loss, meaning total lack of vision including an inability to see light at all. The most common symptoms of blindness are loss or lack of vision, cloudy vision, eye pain, and change in eye color. These symptoms can develop rapidly, slowly over time, or be present from birth depending on the cause. Blindness is diagnosed using an eye exam that measures the patient’s clearness of vision, strength of eye muscles, and reaction to light. Treatment for blindness depends on the cause and severity of the condition.

If you experience sudden vision loss, contact a medical professional immediately as this could be a sign of a serious condition. If you have concerns about your vision or have been diagnosed with diabetes, it is important to have regular eye checkups to prevent worsening or loss of vision. If you are pregnant, consult with your doctor to confirm all immunizations are up to date and to screen for sexually transmitted infections before delivery to prevent vision and other problems in your child. Support groups are also available for more resources and information.

Source: Advocacy organizations associated with the condition.

 

Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Blindness" for support, advocacy or research.

Usher Syndrome Coalition

The Usher Syndrome Coalition's mission is to raise awareness and accelerate research for the most common cause of combined deafness and blindness. The Coalition also provides information and support to individuals and families affected by Usher syndrome.

Last Updated: 31 Oct 2014

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Oklahoma Family Network

To Provide emotional, informational and navigational support to those who have special health care needs or a disability, their families and the professionals who serve them. OFN promotes family/professional partnerships and family-centered care, assuring services are offered as recipients prefer..

Last Updated: 15 Apr 2013

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Xeroderma Pigmentosum Family Support Group

The Xeroderma Pigmentosum (XP) Family Support group exists to improve the quality of life persons of those persons with XP and other diagnosed UV light conditions

Last Updated: 2 Dec 2009

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Zellweger Baby Support Network

This organization was started by a small group of parents whose lives have been affected in some way by a rare disorder. Our gift, in honor of our children, was to start this site, so we can help families and to raise awareness of these rare disorders. If your child has been diagnosed with Zellweger syndrome, a peroxisomal disorder or another rare disorder, we are here to help you. You are not alone! Our mission is to promote, advance, and improve awareness of Zellweger syndrome and other peroxisomal disorders, to assist, support, and aid, financially or otherwise, individuals and families affected by Zellweger syndrome. We will help you learn more about these disorders. We will provide emotional support, and we can help you to create a journal site for your child so that family and friends can be kept up to date on your child. We will pray with you and for you as you journey through life with your special angel. We know this is a hard time for you; you want answers, informa

Last Updated: 20 Feb 2013

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General Support Organizations

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How do you compare to others with this condition?

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Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Blindness" for support, advocacy or research.

Usher Syndrome Coalition

The Usher Syndrome Coalition's mission is to raise awareness and accelerate research for the most common cause of combined deafness and blindness. The Coalition also provides information and support to individuals and families affected by Usher syndrome.

http://www.usher-syndrome.org

Last Updated: 31 Oct 2014

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Oklahoma Family Network

To Provide emotional, informational and navigational support to those who have special health care needs or a disability, their families and the professionals who serve them. OFN promotes family/professional partnerships and family-centered care, assuring services are offered as recipients prefer..

http://www.oklahomafamilynetwork.org

Last Updated: 15 Apr 2013

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Xeroderma Pigmentosum Family Support Group

The Xeroderma Pigmentosum (XP) Family Support group exists to improve the quality of life persons of those persons with XP and other diagnosed UV light conditions

http://www.xpfamilysupport.org

Last Updated: 2 Dec 2009

View Details
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Zellweger Baby Support Network

This organization was started by a small group of parents whose lives have been affected in some way by a rare disorder. Our gift, in honor of our children, was to start this site, so we can help families and to raise awareness of these rare disorders. If your child has been diagnosed with Zellweger syndrome, a peroxisomal disorder or another rare disorder, we are here to help you. You are not alone! Our mission is to promote, advance, and improve awareness of Zellweger syndrome and other peroxisomal disorders, to assist, support, and aid, financially or otherwise, individuals and families affected by Zellweger syndrome. We will help you learn more about these disorders. We will provide emotional support, and we can help you to create a journal site for your child so that family and friends can be kept up to date on your child. We will pray with you and for you as you journey through life with your special angel. We know this is a hard time for you; you want answers, informa

http://www.zbsn.org

Last Updated: 20 Feb 2013

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General Support Organizations

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Scientific Literature

Articles from the PubMed Database

Research articles describe the outcome of a single study. They are the published results of original research.
The terms "Blindness" returned 988 free, full-text research articles on human participants. First 3 results:

Prevalence and causes of low vision and blindness in an elderly population in Nepal: the Bhaktapur retina study.
 

Author(s): Raba Thapa, Sanyam Bajimaya, Govinda Paudyal, Shankar Khanal, Stevie Tan, Suman S Thapa, G H M B van Rens

Journal:

 

This study aims to explore the prevalence and causes of low vision and blindness focused on retinal disease in a population above 60 years in Nepal.

Last Updated: 31 Dec 1969

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Prevalence and causes of blindness, visual impairment among different ethnical minority groups in Xinjiang Uygur autonomous region, China.
 

Author(s): Yanping Li, Wenyong Huang, Aoyun Qiqige, Hongwei Zhang, Ling Jin, Pula Ti, Jennifer Yip, Baixiang Xiao

Journal:

 

The aim of this cross-sectional study is to ascertain the prevalence and causes of blindness, visual impairment, uptake of cataract surgery among different ethnic groups in Xinjiang Uygur Autonomous Region, China.

Last Updated: 31 Dec 1969

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Extrinsic grouping factors in motion-induced blindness.
 

Author(s): Dina Devyatko, Alexander Pastukhov

Journal:

 

We investigated how various grouping factors altered subjective disappearances of the individual targets in the motion-induced blindness display. The latter relies on a moving mask to render highly salient static targets temporarily subjectively invisible. Specifically, we employed ...

Last Updated: 31 Dec 1969

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Reviews from the PubMed Database

Review articles summarize what is currently known about a disease. They discuss research previously published by others.
The terms "Blindness" returned 77 free, full-text review articles on human participants. First 3 results:

Global causes of blindness and distance vision impairment 1990-2020: a systematic review and meta-analysis.
 

Author(s): Seth R Flaxman, Rupert R A Bourne, Serge Resnikoff, Peter Ackland, Tasanee Braithwaite, Maria V Cicinelli, Aditi Das, Jost B Jonas, Jill Keeffe, John H Kempen, Janet Leasher, Hans Limburg, Kovin Naidoo, Konrad Pesudovs, Alex Silvester, Gretchen A Stevens, Nina Tahhan, Tien Y Wong, Hugh R Taylor,

Journal: Lancet Glob Health. 2017 12;5(12):e1221-e1234.

 

Contemporary data for causes of vision impairment and blindness form an important basis of recommendations in public health policies. Refreshment of the Global Vision Database with recently published data sources permitted modelling of cause of vision loss data from 1990 to 2015, ...

Last Updated: 31 Dec 1969

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Magnitude, temporal trends, and projections of the global prevalence of blindness and distance and near vision impairment: a systematic review and meta-analysis.
 

Author(s): Rupert R A Bourne, Seth R Flaxman, Tasanee Braithwaite, Maria V Cicinelli, Aditi Das, Jost B Jonas, Jill Keeffe, John H Kempen, Janet Leasher, Hans Limburg, Kovin Naidoo, Konrad Pesudovs, Serge Resnikoff, Alex Silvester, Gretchen A Stevens, Nina Tahhan, Tien Y Wong, Hugh R Taylor,

Journal: Lancet Glob Health. 2017 09;5(9):e888-e897.

 

Global and regional prevalence estimates for blindness and vision impairment are important for the development of public health policies. We aimed to provide global estimates, trends, and projections of global blindness and vision impairment.

Last Updated: 31 Dec 1969

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Definition of blindness under National Programme for Control of Blindness: Do we need to revise it?
 

Author(s): Praveen Vashist, Suraj Singh Senjam, Vivek Gupta, Noopur Gupta, Atul Kumar

Journal: Indian J Ophthalmol. 2017 Feb;65(2):92-96.

 

A review appropriateness of the current definition of blindness under National Programme for Control of Blindness (NPCB), Government of India. Online search of peer-reviewed scientific published literature and guidelines using PubMed, the World Health Organization (WHO) IRIS, and ...

Last Updated: 31 Dec 1969

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Clinical Trial Information This information is provided by ClinicalTrials.gov

Last Updated: 5 Feb 2018

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Development of a Cortical Visual Neuroprosthesis for the Blind
 

Status: Recruiting

Condition Summary: Blindness

 

Last Updated: 25 Oct 2017

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Early Feasibility Study of the Orion Visual Cortical Prosthesis System
 

Status: Recruiting

Condition Summary: Blindness, Acquired

 

Last Updated: 20 Nov 2017

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