منابع مشابه
Optic Nerve Head Blood Flow in Glaucoma
These days it is commonly accepted that multiple factors are involved in the etiology of glaucoma. Although many studies have demonstrated that the major risk factor for glaucoma is an increase in intraocular pressure (IOP), some studies, including epidemiologic studies, have suggested an association between glaucoma, especially primary open-angle glaucoma (POAG) and normal-tension glaucoma (NT...
متن کاملThe role of blood flow in glaucoma
The arterial supply to the eye arises primarily from the ophthalmic artery (OA), which is the first branch of the internal carotid artery (ICA) and is approximately 0.5 mm in diameter. The OA branches into the central retinal artery (CRA) and one to five posterior ciliary trunks which divide into multiple branches forming separate groups of the main posterior ciliary arteries (PCA). The PCA bra...
متن کاملOcular Blood Flow and Normal Tension Glaucoma
Normal tension glaucoma (NTG) is known as a multifactorial optic neuropathy characterized by progressive retinal ganglion cell death and glaucomatous visual field loss, even though the intraocular pressure (IOP) does not exceed the normal range. The pathophysiology of NTG remains largely undetermined. It is hypothesized that the abnormal ocular blood flow is involved in the pathogenesis of this...
متن کاملCurrent Imaging Modalities for assessing Ocular Blood Flow in Glaucoma
Glaucoma may be caused by an interplay of elevated intraocular pressure (IOP), vascular, genetic, anatomical, brain, and immune factors. The direct assessment of ocular hemodynam-ics offers promise for glaucoma detection, differentiation, and possibly new treatment modalities. All the methods currently in use to measure ocular blood flow have inherent limitations and measure different aspects o...
متن کاملPulsatile ocular blood flow in patients with low tension glaucoma.
Measurements of the intraocular pressure (IOP) pulse and pulsatile ocular blood flow (POBF) have been made in 22 patients with bilateral low tension glaucoma (LTG) and 29 healthy subjects matched as closely as possible for age, refractive error, IOP, systemic pulse pressure, and heart rate. Recordings were made in both the standing and supine positions. The amplitude of the intraocular pressure...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 2006
ISSN: 0007-1161
DOI: 10.1136/bjo.2006.103010