Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «G»:
Glass eye: 1. A globe of glass that looks like and is intended to replace the eyeball.
2. By extension, a real eye that looks glassy and as lifeless as a poorly crafted glass eye,
The first glass eye was made in 1832 by the glassblower Ludwig Muller-Uri in Lauscha, Germany. Although artificial eye...
Glaucoma: A common eye condition in which the fluid
pressure inside the eyes rises because of slowed fluid drainage from
the eye. If untreated, it may damage the optic nerve and other parts of the eye, causing the loss of vision or even blindness.
The elderly, African-Americans, and people with fa...
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...
Glaucoma treatment (laser)
Glaucoma treatment (laser): 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 for...
Glaucoma treatment (medical)
Glaucoma treatment (medical): 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...
Glaucoma treatment (surgery)
Glaucoma treatment (surgery): 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
Glaucoma, acute angle-closure
Glaucoma, acute angle-closure: Increased pressure
in the front chamber
(anterior chamber) of the eye due to sudden (acute)
blockage of the normal
circulation of fluid within the eye. The block takes place
at the angle of
the anterior chamber formed by its junction of the cornea
with the iris.
Glaucoma, angle-closure: Increased pressure in
the front chamber (anterior
chamber) of the eye due to sudden (acute) or slowly
blockage of the normal circulation of fluid within the eye.
The block takes
place at the angle of the anterior chamber formed by its
junction of th...
Glaucoma, low tension
Glaucoma, low tension: See: Glaucoma, normal tension....
Glaucoma, normal pressure
Glaucoma, normal pressure: See: Glaucoma, normal tension....
Glaucoma, normal tension
Glaucoma, normal tension: Glaucoma in which the intraocular pressure is normal but there is progressive optic nerve damage and visual field loss. Risk factors include a family history of normal tension glaucoma, Japanese ancestry, and a history of heart disease. This
disorder is believed due to poo...
Glaucoma, risk factors
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...
Glaucoma, symptoms of
Glaucoma, symptoms of: 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 th...
Gleason score: A grading system for prostate carcinoma devised by Dr. Donald Gleason in 1977 as a method for predicting the behavior of prostate cancer.
Tumors with a low Gleason score are less likely to show aggressive behavior and therefore are less likely to have spread outside of the gland to ...
Glenn shunt: A surgical operation for children born with cyanotic heart disease ("blue babies"), in which a large vein (the superior vena cava) is anastomosed (connected) to the right pulmonary artery so that blood bypasses the malformed right chambers of the heart and is shunted directly into the l...