GLACOUMA

Glaucoma is a
disease in which the optic
nerve is damaged, leading to progressive,
irreversible loss of vision. It is often, but
not always, associated with increased
pressure of the fluid in the eye.[1]
The nerve damage involves loss of retinal
ganglion cells in a characteristic pattern.
There are many different sub-types of
glaucoma but they can all be considered as
a type of optic neuropathy. Raised
intraocular pressure is a significant risk
factor for developing glaucoma (above 22
mmHg or 2.9 kPa). One person may
develop nerve damage at a relatively low
pressure, while another person may have
high eye pressure for years and yet never
develop damage. Untreated glaucoma
leads to permanent damage of the optic
nerve and resultant visual field loss, which
can progress to blindness.
Glaucoma can be divided roughly into two
main categories, "open angle" and "closed
angle" glaucoma. Closed angle glaucoma
can appear suddenly and is often painful;
visual loss can progress quickly but the
discomfort often leads patients to seek
medical attention before permanent
damage occurs. Open angle, chronic
glaucoma tends to progress more slowly
and the patient may not notice that they
have lost vision until the disease has
progressed significantly.
Glaucoma has been nicknamed the "sneak
thief of sight" because the loss of vision
normally occurs gradually over a long
period of time and is often only
recognized when the disease is quite
advanced. Once lost, this damaged visual
field can never be recovered. Worldwide,
it is the second leading cause of
blindness.for more information join
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