THE GLAUCOMA
- "A group of eye conditions that damage the optic nerve, that damage is often caused by an abnormally high pressure in your eye.
- it cause loss of vision and blindness" .That effect over the age of 60.
- more common in older adults.
how to damage optic nerve in glaucoma
- the drainage angle formed by cornea and iris remains open , but trabecular meshwork is partially blocked.
- eye pressure gradually increase. this increase pressure cause damages the optic nerve.
- this vision loss can't be recovered, damage of optic nerve cause blind spots develop in your visual field.
- the pressure increase fluid is aqueous humor , it flows throghout the inside of your visual field.
- the internal fluid normally drains out through a tissue called the trabecular meshwork at the angle in between iris and cornea.
- when fluid is overproduced or the drainage system doesn't work properly.
- eye pressure increases fluid can't flow out at normal rate.
why you must known about glaucoma
- it have no any warning sings before.
- no any pain and not notce a change in vision untile become stage of advanced condition.
- early stage it can identify by TONOMETER .
- it helpfull for early slowed or prevented.
- the tonometer touching cornea to measure the eye pressure.
- 1st numbning eye drop put in eye for remove discomfort at touching sense from the cornea.
type of gluacoma
open angle glaucoma -- most common form, drainage angle open but trabecular meshwork is partially blocked.
- gradually increase eye pressure.
- this pressure damage the optic nerve.
- not early identify it cause loss of vision.
angle closure glaucoma
- another name is closed angle glaucoma.
- iris bulges forward to narrow draimage angle or block drainage angle formed by cornea and iris.
- narrow drainage angles cause fluid can't circulate through the eye and inceases pressure.
- angle closure glaucoma gradually increase, it may be medical emergency called it acute angle closure glaucoma.
normal tension glaucoma
- your optic nerve damaged by normal range of eye pressure increase.
- no exact reason but sensitive optic nerve or less blood supplied for optic nerve.
- blood supply limit by fatty diposits called as atherosclerosis.
glaucoma in children
- it may effect infants and children at birth or develop in the first few years of life.
- it caused by drainage blockages or medical condition.
pigmentary glaucoma
- pigment granules from your iris , build up in draimage channles, slowing or blocking fluid exiting your eye.
- the pigment granules depositing on trabecular meshwork it causing intermittent pressure elevations.
risk factors
chronic forms glaucoma can destroy any signs and symptoms
- high internal eye pressure
- age over 60
- black, asian or hispanic
- family history of glaucoma
- certain medical conditions - diabetes , heart disease , high blood pressure and sickle cell anemia
- thin in center of cornea
- eye injury or certain types of eye surgery
- taking corticosteroid medications, especially eyedrops used long time
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Diseases and Disorders