Blurred vision is a lack of sharpness as a result the person is
enable to see fine details or small objects. Blurred vision can occur
when a person who wears corrective lens is without them. Blurred vision
can also be a sign of various eye diseases like cataracts, glaucoma, age
related macular degeneration, diabetes, retinal detachment, brain
tumor, or optic nerve damage.
Glaucoma is a group of eye diseases
characterized by damage to the optic nerve. (optic nerve carries images
from retina, which is the specialized light sensing tissue, to the brain
so we can see) usually due to high intraocular pressure. If untreated,
it can lead to optic nerve damage resulting in progressive, permanent
vision loss. It is a leading cause of preventable blindness among
people, especially in America and Africa. The risk of glaucoma increases
dramatically with age. But it can strike any age group, even newborn
infants and fetuses.
Glaucoma can be classified in two categories: Chronic Open angle Glaucoma and Narrow angle closure glaucoma.
Chronic
Open angle Glaucoma: It is the most common form of Glaucoma. The "open
"drainage angle of the eye can become blocked leading to gradual
increase in eye pressure. This increase results in optic nerve damage.
Narrow
angle Closure Glaucoma: It is caused when contact between the iris and
trabecular meshwork, which in turn obstructs outflow of aqueous humor
from the eye, as a result the drainage angle of the eye narrows and
becomes completely blocked. When the drainage angle of the eye suddenly
becomes completely blocked pressure builds up naturally and this is
called acute angle closure glaucoma. The symptoms include severe eye
pain, blurred vision, headache, nausea and vomiting.
The treatment
of glaucoma depends upon the nature and severity of each case. In
general glaucoma cannot be cured, but it can be controlled. Eye drops,
pills, laser procedures and surgical operations are used to prevent or
slow down further damage.
