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ocular hypertension
Ocular hypertension is a clinical term describing the presence of elevated intraocular pressure in the absence of optic nerve damage or visual field loss.〔(American Academy of Ophthalmology )〕〔(American Optometric Association - Ocular Hypertension )〕
For most individuals, the normal range of introcular pressure is between 10 mmHg and 21 mmHg.〔(webMD - Tonometry )〕〔(eMedicine - Glaucoma Overview )〕 Elevated intraocular pressure is an important risk factor for glaucoma. The Ocular Hypertension Treatment Study, a large, multicentered, randomized clinical trial, determined that topical ocular hypotensive medication delays or prevents the onset of Primary Open-Angle Glaucoma. Accordingly, most individuals with consistently elevated intraocular pressures of greater than 21mmHg, particularly if they have other risk factors, are treated in an effort to prevent vision loss from glaucoma.
==Pathophysiology==
The pressure within the eye is maintained by the balance between the fluid that enters the eye through the ciliary body and the fluid that exits the eye through the trabecular meshwork.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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