| umls-concept:C0017601 | skos:definition | MSH: An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed),CSP: group of diseases characterized by increased intraocular pressure resulting in damage to the optic nerve and retinal nerve fibers.,MEDLINEPLUS: <p>Glaucoma damages the eye's optic nerve. It is a leading cause of <a href='http://www.nlm.nih.gov/medlineplus/visionimpairmentandblindness.html'>blindness</a> in the United States. It usually happens when the fluid pressure inside the eyes slowly rises, damag | lld:umls |
