what is the cause of blindness

Top Causes of Vision Loss and Blindness

For the purposes of this article, we will look at the top five eye conditions that cause blindness: Cataracts, Glaucoma, Age-Related Macular Degeneration, Diabetic Retinopathy and Retinitis Pigmentosa. Other conditions do exist, however, they will not be discussed here. Cataracts: Cataracts are caused by the clouding of the lens of the eye. Sep 05,  · Optic neuritis is inflammation that can cause temporary or permanent vision loss. Retinitis pigmentosa refers to damage of the retina. It leads to .

Here are the five most common causes of blindness worldwide. Age, injury or genetics can cause the typical cloudy lens. It can take just 15 minutes to perform a sight-restoring cataract operation. The third leading cause of blindness, glaucoma can be treated with medication. Onchocerciasis, or River Blindness, is a parasitic disease caused by onchocerca volvulus.

It caise characterised by itchy skin and severe swelling in the eye which results in impaired vision, including blinness blindness. River blindness is on the retreat worldwide thanks to the widespread how to use a charcoal smoker with wood chips of the drug Mectizan.

About 2 million people have impaired vision or are blind what is the cause of blindness of trachoma — the most widespread infectious cause of blindness. Repeated infections with the bacterium Chlamydia trachomatis cause the inside of the eyelid to scar, making the eyelashes turn inward.

These, in turn, scratch the cornea, leading how to program your directv genie remote irreversible blindness. In its earlier stages, trachoma is treated with antibiotics and can be prevented by keeping the face clean. In the final stage of the illness, known as Trachomatous Trichiasis, surgery on the eyelid is the only way to avoid loss of what is the cause of blindness. Around million people have uncorrected refractive errorwhich causes blurred vision.

Yet many people just need a pair of glasses to see clearly again. In UgandaLight for the World together with the Brien Holden Vision Institute has launched a national programme giving poor people access to high quality, tailor-made spectacles. Three-year-old Greta was born with cataracts, but thanks to a national programme in Uganda supported by Light for the World, she got the surgery and glasses she needed.

Around 1 million children worldwide are blind and about 19 million visually impaired bljndness to uncorrected refractive error, vitamin A deficiency, cataract or injury. At least 75 percent of blindness is avoidable. Incuase partners performed 68, eye surgeries and distributed We will continue to promote eye health, doing our utmost to reach the unreached — people who are marginalised and have no access to affordable eye care.

Causes of blindness. Glaucoma The third leading cause of blindness, glaucoma can be treated blindnes medication. River blindness Onchocerciasis, or River Blindness, is a parasitic disease caused by onchocerca volvulus. Trachoma Cauxe 2 million people have impaired vision or are blind because of trachoma — the most widespread infectious cause of blindness.

Uncorrected refractive error URE Around million people have uncorrected refractive error ls, which causes blurred vision. Help us save eyesight. Donate now. Donate Donate blineness.

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Share on Facebook! Vision loss and blindness can be caused by several factors. These factors can be genetic, environmental or accidental. In order to better comprehend how blindness can affect the individual, it is important to understand what blindness is. A person can also be considered legally blind if their visual field, that is what they perceive to either side of them is 20 degrees or less.

For the purposes of this article, we will look at the top five eye conditions that cause blindness: Cataracts, Glaucoma, Age-Related Macular Degeneration, Diabetic Retinopathy and Retinitis Pigmentosa. Other conditions do exist, however, they will not be discussed here. Cataracts are caused by the clouding of the lens of the eye.

This means that the light that comes through the pupil and passes through the lens to be focused to the retina is blurred. This will cause your vision to become cloudy, blurry and, or, dim.

Colors may not seem as bright or vivid as before. This condition occurs gradually and you may not notice it at first. Cataracts can be treated with surgery. It is caused by excess fluid in the eye which increases the eye pressure.

This fluid is called aqueous humor. It is produced in the front portion of the eye and leaves the eye through the drainage angle.

This keeps the intraocular pressure, at a healthy level. This pressure may vary from person to person. When the fluid does not leave the eye correctly, it will cause pressure to increase which will gradually damage the optic nerve. There are several types of glaucoma. Open-angle Glaucoma is the most prevalent and happens when your eye can no longer drain fluid efficiently, causing the pressure to build. Open-angle Glaucoma has no early symptoms. As it progresses the optic nerve will become damaged, and you will start to notice blank spots in your field of vision.

These spots will grow larger until all optic nerves are damaged, at which point, you will be blind. Normal Tension Glaucoma is characterized by low pressure in the eye.

This type of Glaucoma can also cause nerve damage and loss of vision. Treatment for both Open-angle Glaucoma and Normal tension Glaucoma is the same. The disease can be managed by prescription eye drops or surgery. Unlike Primary Open-angle Glaucoma however, Primary Acute Closed-angle Glaucoma happens quite suddenly and should be attended to immediately.

It results from a buildup of fluid because the drainage system is blocked and fluid can no longer drain from the eye. Macular Degeneration destroys the light sensitive cells in the macula, the part of the eye that lets you see objects in great detail.

Often, the progress of AMD is so slow that you do not notice any change in your vision, but it can progress quickly as well. There are two types of Macular Degeneration: wet and dry. Wet Macular Degeneration occurs when irregular blood vessels begin growing behind the retina under the macula. Dry Macular Degeneration is caused by the breakdown of light sensitive cells in the macula causing the central vision to blur. The treatment for Wet Macular Degeneration includes surgery.

At this time, no treatment exists for Dry Macular Degeneration. Diabetic Retinopathy is caused by diabetes. It affects the retina, the part of the eye sensitive to light. It is a result of high blood glucose, or sugar, over a prolonged period of time. High blood sugar prevents the blood vessels in the back of the eye from delivering the proper nutrients to the retina.

Early on in the progress of the disease, these blood vessels will leak fluid and will cause site distortions. As the disease progresses, new blood vessels are formed around the retina and in the vitreous humor. These blood vessels will bleed making the vision cloudy and eventually causing the retina to detach. If not treated, a retinal detachment may cause permanent blindness. Vision loss caused by Diabetic Retinopathy can be prevented by laser surgery, a proper diet and controlling your blood glucose levels and blood pressure.

It is a geneticly inherited disease. The symptoms include loss of night vision and peripheral vision. While research is on-going, there is no cure at this time. Minneapolis, MN Phone: Toll Free: Fax: Email: info blindinc. Eye Conditions and Their Causes Vision loss and blindness can be caused by several factors.

Cataracts: Cataracts are caused by the clouding of the lens of the eye. Age-Related Macular Degeneration: Macular Degeneration destroys the light sensitive cells in the macula, the part of the eye that lets you see objects in great detail.

Diabetic Retinopathy: Diabetic Retinopathy is caused by diabetes.