Pathogenesis of visual field defects. Role of the ciliary circulation.
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TLDR
The present study demonstrates such a sectoral blood supply in the optic nerve head and choroid and is of considerable significance in explaining the site of the lesion and the pathogenesis of these defects.Abstract:
Clinically the presence of nerve fibre bundle defects in glaucoma and non-glaucomatous lesions, and altitudinal or vertical hemianopias in pre-chiasmal lesions has been known for a long time. These suggest a sectoral lesion in the optic nerve or retina. In the majority of such cases, no retinal lesion is seen to account for these visual field defects. It has been presumed that the lesion lies in the optic nerve. Such a visual field defect can be produced only by a sectoral lesion. Most of these field defects are considered to be vascular in origin, but studies of the blood supply of the optic nerve have so far failed to demonstrate any segmental blood supply to the nerve which could explain them. The present study demonstrates such a sectoral blood supply in the optic nerve head and choroid and is of considerable significance in explaining the site of the lesion and the pathogenesis of these defects.read more
Citations
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Orthograde and retrograde axoplasmic transport during acute ocular hypertension in the monkey.
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The blood supply of the optic nerve head and the evaluation of it - myth and reality.
TL;DR: The objective of this paper is to differentiate myths and misconceptions from reality about the OnH blood supply; to elucidate the reasons for disagreement on the blood supply of the ONH; and to evaluate the reliability and validity of various methods currently used to measure ONH blood flow.
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Central retinal artery occlusion: visual outcome.
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References
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Journal ArticleDOI
Experimental research on the connection of rising of ocular tension and disturbances of the visual field
F. Gafner,H. Goldmann +1 more
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Common Pathological Basis of the Nervous Ocular Symptoms in Chronic Glaucoma: A Preliminary Note *
TL;DR: The nature of the vascular alteration of the nerve fibre in glaucomatous atrophy is investigated to investigate the pathogenesis of hypertension and the field changes associated with a pathological tissue change.
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Relation of field contraction to blood pressure in chronic primary glaucoma
TL;DR: It is common experience that in cases of chronic primary glaucoma there is often an inconsistency between the height of the intraocular pressure and the rate of contraction of the visual fields.