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- Glaucoma abstract "Glaucoma is a term describing a group of ocular disorders with multi-factorial etiology united by a clinically characteristic intraocular pressure-associated optic neuropathy. This can permanently damage vision in the affected eye(s) and lead to blindness if left untreated. It is normally associated with increased fluid pressure in the eye (aqueous humour). The term "ocular hypertension" is used for people with consistently raised intraocular pressure (IOP) without any associated optic nerve damage. Conversely, the term 'normal tension' or 'low tension' glaucoma is used for those with optic nerve damage and associated visual field loss, but normal or low IOP.The nerve damage involves loss of retinal ganglion cells in a characteristic pattern. The many different subtypes of glaucoma can all be considered to be a type of optic neuropathy. Raised intraocular pressure (above 21 mmHg or 2.8 kPa) is the most important and only modifiable risk factor for glaucoma. However, some may have high eye pressure for years and never develop damage, while others can develop nerve damage at a relatively low pressure. Untreated glaucoma can lead to permanent damage of the optic nerve and resultant visual field loss, which over time can progress to blindness.Glaucoma can be roughly divided into two main categories, "open-angle" and "closed-angle" (or "angle closure") glaucoma. The angle refers to the area between the iris and cornea, through which fluid must flow to escape via the trabecular meshwork. Closed-angle glaucoma can appear suddenly and is often painful; visual loss can progress quickly, but the discomfort often leads patients to seek medical attention before permanent damage occurs. Open-angle, chronic glaucoma tends to progress at a slower rate and patients may not notice they have lost vision until the disease has progressed significantly.When the scleral venous sinus is blocked to where aqueous humor is not reabsorbed at a faster rate than it is being secreted, elevated pressure within the eye occurs. Pressure in the anterior and posterior chambers pushes the lens back and puts pressure on the vitreous body. The vitreous body presses the retina against the choroid and compresses the blood vessels that feed the retina. Without a sufficient blood supply, retinal cells will die and the optic nerve may atrophy, causing blindness. Typically, the nerves furthest from the focal point fail first because of their distance from the central blood supply to the eye; thus, vision loss due to glaucoma tends to start at the edges with the peripheral visual field, leading to progressively worse tunnel vision.Glaucoma has been called the "silent thief of sight" because the loss of vision often occurs gradually over a long period of time, and symptoms only occur when the disease is quite advanced. Once lost, vision cannot normally be recovered, so treatment is aimed at preventing further loss. Worldwide, glaucoma is the second-leading cause of blindness after cataracts. It is also the leading cause of blindness among African Americans. Glaucoma affects one in 200 people aged 50 and younger, and one in 10 over the age of eighty. If the condition is detected early enough, it is possible to arrest the development or slow the progression with medical and surgical means.The word "glaucoma" comes from the Greek γλαύκωμα, "opacity of the crystalline lens". (Cataracts and glaucoma were not distinguished until c. 1705.)".
- Glaucoma diseasesdb "5226".
- Glaucoma emedicineSubject "oph".
- Glaucoma emedicineTopic "578".
- Glaucoma icd10 "H40-H42".
- Glaucoma icd9 "365".
- Glaucoma medlineplus "001620".
- Glaucoma meshId "D005901".
- Glaucoma thumbnail Acute_angle_closure_glaucoma.JPG?width=300.
- Glaucoma wikiPageExternalLink 7276822.stm.
- Glaucoma wikiPageExternalLink glaucoma.htm.
- Glaucoma wikiPageExternalLink index.html.
- Glaucoma wikiPageExternalLink bmes.htm.
- Glaucoma wikiPageExternalLink NBK1135.
- Glaucoma wikiPageExternalLink index.asp.
- Glaucoma wikiPageExternalLink study24.asp.
- Glaucoma wikiPageExternalLink study49.asp.
- Glaucoma wikiPageID "74748".
- Glaucoma wikiPageRevisionID "605897970".
- Glaucoma caption "Acute angle closure glaucoma of the right eye. Note the mid sized pupil, which was nonreactive to light, and injection of the conjunctiva.".
- Glaucoma diseasesdb "5226".
- Glaucoma emedicinesubj "oph".
- Glaucoma emedicinetopic "578".
- Glaucoma hasPhotoCollection Glaucoma.
- Glaucoma icd "365".
- Glaucoma icd "H40-H42".
- Glaucoma medlineplus "1620".
- Glaucoma meshid "D005901".
- Glaucoma name "Glaucoma".
- Glaucoma wordnet_type synset-disease-noun-1.
- Glaucoma subject Category:Blindness.
- Glaucoma subject Category:Glaucoma.
- Glaucoma type Disease.
- Glaucoma type AilmentCondition.
- Glaucoma type Situation.
- Glaucoma comment "Glaucoma is a term describing a group of ocular disorders with multi-factorial etiology united by a clinically characteristic intraocular pressure-associated optic neuropathy. This can permanently damage vision in the affected eye(s) and lead to blindness if left untreated. It is normally associated with increased fluid pressure in the eye (aqueous humour).".
- Glaucoma label "Glaucoma".
- Glaucoma label "Glaucoma".
- Glaucoma label "Glaucoma".
- Glaucoma label "Glaucoma".
- Glaucoma label "Glaucome".
- Glaucoma label "Glaucoom".
- Glaucoma label "Glaukom".
- Glaucoma label "Jaskra".
- Glaucoma label "Глаукома".
- Glaucoma label "زرق".
- Glaucoma label "緑内障".
- Glaucoma label "青光眼".
- Glaucoma sameAs Glaukom.
- Glaucoma sameAs Glaukom.
- Glaucoma sameAs Γλαύκωμα.
- Glaucoma sameAs Glaucoma.
- Glaucoma sameAs Glaukoma.
- Glaucoma sameAs Glaucome.
- Glaucoma sameAs Glaukoma.
- Glaucoma sameAs Glaucoma.
- Glaucoma sameAs 緑内障.
- Glaucoma sameAs 녹내장.
- Glaucoma sameAs Glaucoom.
- Glaucoma sameAs Jaskra.
- Glaucoma sameAs Glaucoma.
- Glaucoma sameAs Glaucoma.
- Glaucoma sameAs m.0jy0d.
- Glaucoma sameAs Q159701.
- Glaucoma sameAs Q159701.
- Glaucoma sameAs 449.
- Glaucoma sameAs C0017601.
- Glaucoma sameAs C0017605.
- Glaucoma sameAs C0017612.
- Glaucoma sameAs C0281773.
- Glaucoma wasDerivedFrom Glaucoma?oldid=605897970.
- Glaucoma depiction Acute_angle_closure_glaucoma.JPG.
- Glaucoma isPrimaryTopicOf Glaucoma.
- Glaucoma name "Glaucoma".