It is the second most common cause of blindness due to infection after trachoma.
The most common cause of blindness in india is.
Cause for blindness.
For example in low income countries congenital cataract is a leading.
Among children the causes of vision impairment vary considerably across countries.
Glaucoma diabetic retinopathy and corneal diseases form priorities under india s vision 2020 action plan.
Cataract is the opacification of the lens in the eye and in advanced cases a whitish reflex can be seen in the eye.
Click here to see the anatomy the eye and how the eyes work.
Blindness presenting visual acuity worse than 3 60.
And 80 of blindness is found in individuals over 50 years old.
The leading causes of chronic blindness include cataract refractive errors glaucoma corneal opacities age related macular degeneration trachoma childhood blindness and diabetic retinopathy.
Symptoms include severe itching bumps under the skin and blindness.
The parasite worm is spread by the bites of a black fly of the simulium type.
Other common eye disorders include amblyopia and strabismus.
Onchocerciasis also known as river blindness is a disease caused by infection with the parasitic worm onchocerca volvulus.
According to the national program for control of blindness the number stands at 8 out of 10 000 for childhood blindness in india.
Were the most common cause.
In high income countries diseases such as diabetic retinopathy glaucoma and age related macular degeneration are more common.
The leading causes of blindness and low vision in the united states are primarily age related eye diseases such as age related macular degeneration cataract diabetic retinopathy and glaucoma.
In the world there are 300 400 million people who are visually impaired because of various causes.