| angle closure glaucoma | <ophthalmology> Primary glaucoma in which contact of the iris with the peripheral cornea excludes aqueous humor from the trabecular drainage meshwork causing a sudden blockage of the normal fluid circulation within the eyeball resulting in increased intraocular pressure. Increased pressure within the eyeball can cause damage to the optic nerve and blindness. Symptoms include severe eye or facial pain, nausea, vomiting, decreased vision, blurred vision and seeing halos around objects. The eye appears red with a steamy cornea and a fixed (nonreactive) dilated pupil. Treatment is emergent with medications to lower the pressure within the eye. Synonym: acute glaucoma, closed-angle glaucoma, narrow-angle glaucoma. (14 Aug 2000) |
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| aphakic glaucoma | Glaucoma following cataract removal. (05 Mar 2000) |
| capsular glaucoma | Glaucoma occurring in association with widespread deposition of cellular organelles on the lens capsule, ocular blood vessels, iris, and ciliary body. See: pseudoexfoliation of lens capsule. (05 Mar 2000) |
| malignant glaucoma | Secondary glaucoma caused by forward displacement of the iris and lens, obliterating the anterior chamber; usually follows a filtering operation for primary glaucoma. (05 Mar 2000) |
| ghost cell glaucoma | Glaucoma occurring after vitrectomy, arising from erythrocyte membranes blocking outflow channels of aqueous humor. (05 Mar 2000) |
| glaucoma | <ophthalmology> A group of eye diseases characterised by an increase in intraocular pressure which causes pathological changes in the optic disk and typical defects in the field of vision. It can be corrected by the use of laser light to punch a hole in the iris to relieve the intraocular pressure within the eye. The procedure is painless and requires no anaesthesia. (13 Nov 1997) |
| glaucoma, angle-closure | A form of glaucoma in which the intraocular pressure increases because the angle of the anterior chamber is blocked and the aqueous humor cannot drain from the anterior chamber. (12 Dec 1998) |
| glaucoma detection | You may know of the air puff test or other tests used to measure eye pressure in an eye examination. But, this test alone cannot detect glaucoma. Glaucoma is found most often during an eye examination through dilated pupils after drops are put into the eyes during the exam to enlarge the pupils. This allows the eye care professional to see more of the inside of the eye to check for signs of glaucoma. (12 Dec 1998) |
| glaucoma fulminans | Acute angle-closure glaucoma rapidly followed by blindness. (05 Mar 2000) |
| glaucoma, neovascular | A form of secondary glaucoma which develops as a consequence of another ocular disease and is attributed to the forming of new vessels in the angle of the anterior chamber. (12 Dec 1998) |
| glaucoma, open-angle | Glaucoma in which the angle of the anterior chamber is open and the trabecular meshwork does not encroach on the base of the iris. (12 Dec 1998) |
| glaucoma, risk factors | If you belong to a high-risk group for glaucoma, have your eyes examined through dilated pupils every 2 years by an eye care professional. High-risk groups include everyone with a family history of glaucoma, everyone over the age of 60 and any Black over the age of 40. (Among Blacks, studies show that glaucoma is: 5 times more likely to occur in Blacks than in Whites and about 4 times more likely to cause blindness in Blacks than in Whites). (12 Dec 1998) |
| glaucoma, symptoms | at first, there are no symptoms. Vision stays normal, and there is no pain. However, as the disease progress, a person with glaucoma may notice the side vision gradually failing. That is, objects in front may still be seen clearly, but objects to the side may be missed. As the disease worsens, the field of vision narrows and blindness results. (12 Dec 1998) |
| glaucoma treatment | A laser beam of light is focused on the part of the anterior chamber where the fluid leaves the eye. This results in a series of small changes, which makes it easier for fluid to exit the eye. Over time, the effect of laser surgery may wear off. Patients who have this form of surgery may need to keep taking glaucoma drugs. Although glaucoma cannot be cured, it can usually be controlled. Medical treatment can be in the form of eyedrops or pills. Some drugs are designed to reduce pressure by slowing the flow of fluid into the eye, while others help to improve fluid drainage. The regular use of medications usually controls the increased fluid pressure. However, these drugs may stop working over time or they may cause side effects so that the eye care professional may select other drugs, change the dose, or use other means to deal with the glaucoma. Surgery can also help fluid escape from the eye and thereby reduce the pressure. However, surgery is now usually reserved for patients whose pressure cannot be controlled with eyedrops, pills, or laser surgery. (12 Dec 1998) |
| phacogenic glaucoma | Secondary glaucoma caused by either excessive size or spherical shape of the lens. Synonym: phacogenic glaucoma. (05 Mar 2000) |