What Causes Blindness:
Cataracts form and block the passage of light through the eye. Some people
are born with them, but it gets worse as you get older. They are not painful
but it makes your sight blurry, dimmed or your vision can be doubled. Not
all cataracts require surgery. But the ones that are really big and cause
major sight problems need surgery. What they do is remove your lens.
One in every seven or eight cases of blindness is due to Glaucoma. This is
when the transparent fluid in the front part of the eye does not drain
correctly, and more pressure than normal is built up in the eye. When the
pressure is not under control the fragile structure of the eye is
increasingly damaged, resulting in blurred vision, a narrowed field of sight
and eventually total blindness. There is a lot of pain when eye pressure
rises quickly because of blocked drainage canals. In the more common type
there is NO pain and vision gets worse quickly. Many people are helped very
well by medication, but sometimes surgery is necessary. Early detection is
Only diabetics can have diabetic retinopathy. The increased lifespan of
diabetics has increased the amount of people with this disorder. The tiny
blood vessels of the diabetic’s retina will change and it causes blindness.
Unusual blood vessels are formed, some even break open and this can cause
the retina to break loose from the back of the eye. To reattach or
close up the blood vessels, laser treatment is needed. But some diabetics
do no experience loss of sight.
retina is like the film in a camera. Macular Degeneration is when the retina
has a breakdown, or degeneration. This will happen more often to people
older in age.
usually remains good. Magnifiers or laser treatment can help. Laser
treatment helps because it closes up the abnormal blood vessels that grow
under the retina, or it repairs the macula’s weak spots by removing worn out
and allowing new tissue to grow.
Pigmentosa: This disorder is
sometimes called a "night blindness". What happens is that the retina
and the choroid degenerate. This causes unusual development in the exess
pigment. Usually this happens at about age ten or twelve the child begins to
experience difficulty in seeing at night and in poorly lighted areas. Their
visual field will start to narrow, this sometimes called "tunnel vision".
The vision loss happens fast, most people with this disorder are legally
blind by young adulthood. For this disorder there is no known treatment.