Glaucoma definition

glaucoma definition

Glaucoma definition

 

Glaucoma is a group of eye diseases which result in damage to the optic nerve and cause vision loss. glaucoma as “a group of diseases with certain features including an intraocular pressure that is too high for the continued health of the eye.” So we have moved from thinking of elevated intraocular pressure as the only damaging factor in glaucoma to thinking of it as one factor in the damage caused by glaucoma. However IOP is still the main treatable aspect in glaucoma therapy.

While it is clear that elevated intraocular pressure is a risk factor for optic nerve damage, the mechanism that causes optic nerve damage is not yet clear.

 

About type of glaucoma surgery

The most common type is open-angle glaucoma with less common types including closed-angle glaucoma and normal-tension glaucoma. Open-angle glaucoma develops slowly over time and there is no pain. Peripheral vision may begin to decrease followed by central vision resulting in blindness if not treated. Closed-angle glaucoma can present gradually or suddenly. The sudden presentation may involve severe eye pain, blurred vision, mid-dilated pupil, redness of the eye, and nausea. Vision loss from glaucoma, once it has occurred, is permanent.

iranian surgeryRisk factors for glaucoma include increased pressure in the eye, a family history of the condition, and high blood pressure. For eye pressures a value of greater than 21 mmHg or 2.8 kPa is often used with higher pressures leading to a greater risk. However, some may have high eye pressure for years and never develop damage. Conversely, optic nerve damage may occur with normal pressure, known as normal-tension glaucoma. The mechanism of open-angle glaucoma is believed to be slow exit of aqueous humor through the trabecular meshwork while in closed-angle glaucoma the iris blocks the trabecular meshwork. Diagnosis is by a dilated eye examination. Often the optic nerve shows an abnormal amount of cupping.

If treated early it is possible to slow or stop the progression of disease with medication, laser treatment, or surgery. The goal of these treatments is to decrease eye pressure. A number of different classes of glaucoma medication are available. Laser treatments may be effective in both open-angle and closed-angle glaucoma. A number of types of glaucoma surgeries may be used in people who do not respond sufficiently to other measures. Treatment of closed-angle glaucoma is a medical emergency.

About 6 to 67 million people have glaucoma globally. The disease affects about 2 million people in the United States. It occurs more commonly among older people. Closed-angle glaucoma is more common in women. Glaucoma has been called the "silent thief of sight" because the loss of vision usually occurs slowly over a long period of time. Worldwide, glaucoma is the second-leading cause of blindness after cataracts. Cataract caused 51% of blindness in 2010 while glaucoma caused 8%. The word "glaucoma" is from Ancient Greek glaukos which means blue, green, or gray. In English, the word was used as early as 1587 but did not become commonly used until after 1850, when the development of the ophthalmoscope allowed people to see the optic nerve damage.

 

10 common question about glaucoma definition

1What is glaucoma and what causes it?
Glaucoma is a condition that causes damage to your eye's optic nerve and gets worse over time. It's often linked to a buildup of pressure inside your eye. ... The increased pressure, called intraocular pressure, can damage the optic nerve, which transmits images to your brain.
2What are early signs of glaucoma?
Signs of Glaucoma Loss of peripheral or side vision. This is usually the first sign of vision loss due to glaucoma. Seeing halos around lights. ... Vision loss. ... Redness in the eye. ... Eye that looks hazy. ... Nausea or vomiting. ... Pain in the eye and in the head. ... Narrowing of vision (tunnel vision).
3Can glaucoma be cured?
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 further damage from occurring. With any type of glaucoma, regular eye examinations are very important to detect progression and to prevent vision loss.
4What are the 3 types of glaucoma?
Types of glaucoma. There are four main types of glaucoma: primary open angle glaucoma, primary angle closure glaucoma, secondary glaucoma and developmental glaucoma.
5What should I avoid if I have glaucoma?
Consuming a high trans fatty acid diet can result in damaging the optic nerve. You should avoid foods like baked goods such as cookies, cakes, donuts or fried items like French fries or stick margarine to steer clear from worsening your glaucoma. It may also improve your eye health.
6Can glaucoma be caused by stress?
The literature suggests that stress may play a part in the precipitation of acute closed-angle glaucoma because intraocular pressure (IOP) can be affected by the emotional state of the patient. ... There is some evidence that glaucoma induction is associated with psychophysiological stress.
7Can you feel eye pressure?
Though eye conditions can cause eye pain and vision problems, they rarely cause pressure. Even glaucoma, which is caused by a buildup of pressure inside the eye, doesn't cause a feeling of pressure. ... Pressure behind the eyes feels like fullness or a stretching sensation inside the eye.
8Can glaucoma be stopped?
While there are no known ways of preventing glaucoma, blindness or significant vision loss from glaucoma can be prevented if the disease is recognized in the early stages. ... Glaucoma medications slow the progression of glaucoma by reducing elevated intraocular pressure (IOP) to prevent damage to the optic nerve.
9Is glaucoma a disability?
Social Security will grant disability benefits for glaucoma that has severely affected central and/or peripheral vision. Glaucoma is not a disease by itself, but refers to a group of optic nerve diseases that can cause blindness.
10Which is worse glaucoma or cataracts?
Cataracts are unlikely to be the cause of blindness, not so with Glaucoma; it can cause irreversible blindness and must be treated. Glaucoma and cataracts are more prevalent in people who suffer from diabetes. Although glaucoma may be worse in one eye than the other, usually both eyes are affected.

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Glaucoma definition

 

Glaucoma is a group of eye diseases which result in damage to the optic nerve and cause vision loss. glaucoma as “a group of diseases with certain features including an intraocular pressure that is too high for the continued health of the eye.” So we have moved from thinking of elevated intraocular pressure as the only damaging factor in glaucoma to thinking of it as one factor in the damage caused by glaucoma. However IOP is still the main treatable aspect in glaucoma therapy.

While it is clear that elevated intraocular pressure is a risk factor for optic nerve damage, the mechanism that causes optic nerve damage is not yet clear.

 

About type of glaucoma surgery

The most common type is open-angle glaucoma with less common types including closed-angle glaucoma and normal-tension glaucoma. Open-angle glaucoma develops slowly over time and there is no pain. Peripheral vision may begin to decrease followed by central vision resulting in blindness if not treated. Closed-angle glaucoma can present gradually or suddenly. The sudden presentation may involve severe eye pain, blurred vision, mid-dilated pupil, redness of the eye, and nausea. Vision loss from glaucoma, once it has occurred, is permanent.

iranian surgeryRisk factors for glaucoma include increased pressure in the eye, a family history of the condition, and high blood pressure. For eye pressures a value of greater than 21 mmHg or 2.8 kPa is often used with higher pressures leading to a greater risk. However, some may have high eye pressure for years and never develop damage. Conversely, optic nerve damage may occur with normal pressure, known as normal-tension glaucoma. The mechanism of open-angle glaucoma is believed to be slow exit of aqueous humor through the trabecular meshwork while in closed-angle glaucoma the iris blocks the trabecular meshwork. Diagnosis is by a dilated eye examination. Often the optic nerve shows an abnormal amount of cupping.

If treated early it is possible to slow or stop the progression of disease with medication, laser treatment, or surgery. The goal of these treatments is to decrease eye pressure. A number of different classes of glaucoma medication are available. Laser treatments may be effective in both open-angle and closed-angle glaucoma. A number of types of glaucoma surgeries may be used in people who do not respond sufficiently to other measures. Treatment of closed-angle glaucoma is a medical emergency.

About 6 to 67 million people have glaucoma globally. The disease affects about 2 million people in the United States. It occurs more commonly among older people. Closed-angle glaucoma is more common in women. Glaucoma has been called the “silent thief of sight” because the loss of vision usually occurs slowly over a long period of time. Worldwide, glaucoma is the second-leading cause of blindness after cataracts. Cataract caused 51% of blindness in 2010 while glaucoma caused 8%. The word “glaucoma” is from Ancient Greek glaukos which means blue, green, or gray. In English, the word was used as early as 1587 but did not become commonly used until after 1850, when the development of the ophthalmoscope allowed people to see the optic nerve damage.

 

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