Prevention of blindness - SlideShare

Jun 28, 2014 · An overview of the Blindness • Many countries in the world have used different definition for designating somebody as blind in view of the prevailing local conditions 7. Defining Blindness • Economic Blindness: – The level of blindness that prevents an individual from earning his wages.…

Blindness - SlideShare

Mar 03, 2013 · Blindness 1. BLINDNESS 2. BLINDNESS• WHO definition of blindness Visual acuity of less than 3/60 (Snellens) or its equivalent• In the absence appropriate vision charts (By non-specialized personnel), the WHO has now added the “Inability to count fingers in daylight at a distance of 3 meters” to indicate less than 3/60 or its equivalent.…

Prevent Blindness: A Lifetime of Healthy Vision

Prevent Blindness provides free resources to the public, including fact sheets, an educational video and dedicated webpages to help save si. Fifteenth Annual Eyes on Capitol Hill Advocacy Event. Volunteers to Advocate to Nation’s Leaders on the Need to Provide Support, Funding for Vision and Eye Health Programs and Services ...…

CDC - Onchocerciasis

Aug 10, 2015 · Onchocerciasis, or River Blindness, is a neglected tropical disease (NTD) caused by the parasitic worm Onchocerca volvulus.It is transmitted through repeated bites by blackflies of the genus Simulium.The disease is called River Blindness because the blackfly that transmits the infection lives and breeds near fast-flowing streams and rivers and the infection can result in blindness.…

Onchocerciasis - Wikipedia

Onchocerciasis, also known as river blindness, is a disease caused by infection with the parasitic worm Onchocerca volvulus. Symptoms include severe itching, bumps under the skin, and blindness. It is the second-most common cause of blindness due to infection, after trachoma.. The parasite worm is spread by the bites of a black fly of the Simulium type. ...Causes: Onchocerca volvulus spread by a black fly…

American Institute for the Prevention of Blindness

We're American Institute for the Prevention of Blindness. The Problem of Blindness . 40 million people live in the darkness of blindness throughout the world and over half of this blindness is preventable.Some of the world's children suffer in disproportionate numbers not only from the catastrophes of famine but also from nutritional blindness linked to lack of vitamin A.…

Prevention of Blindness: Trachoma Control

Prevention of Blindness: Trachoma Control . Trachoma is estimated to affect approximately 500 million people, primarily in rural communities of the developing world and in the arid areas of tropical and subtropical zones. Approximately 6-9 million* people are blind from trachoma, and many more have suffered partial loss of vision.…