منابع مشابه
Optic Disk Boundary Detection
Monitoring the shape changes of the optic disk is crucial for the early detection of glaucoma. This requires the optic disk to be segmented from the surrounding fundus. Previous methods required the boundary to be identified manually, for example, by specifying four control points on the boundary. This is not practical for routine clinical analysis, intra-observer and inter-observer variations ...
متن کاملOptic disk drusen.
Optic disk drusen occur in 3.4 to 24 per 1,000 population and are bilateral in approximately 75%. Disturbance in the axonal metabolism in the presence of a small scleral canal--regardless of eyelength--is considered responsible for the development. The drusen increase in size, becoming more visible with age due to continuing calcium apposition, and they are associated with visual field defects ...
متن کاملOptic disk tubercle.
The purpose of this case report was to present a rare case of optic disk tubercle. The optic disk edema resolved on antituberculous therapy with recovery of vision. We concluded that visual loss from an optic disk tubercle can be the presenting sign of tuberculosis.
متن کاملAutomatic Optic Disk Segmentation in Presence of Disk Blurring
Fundus image analysis has emerged as a very useful tool to analyze the structure of retina for detection of different eye-related abnormalities. The detection of these abnormalities requires the segmentation of basic retinal struc‐ tures including blood vessels and optic disk. The optic disk segmentation becomes a challenging task when the optic disk boundary is degraded due to some devia‐ tion...
متن کاملRetinal pigmentation due to choroidal melano-sarcoma with observations on congenital grouped pigmentation of the retina.
A FORM of grouped pigmentation of the retina may occur in association with detached retina due to choroidal melano-sarcoma and, when present, is probably diagnostic of this disease. Grouped pigmentation of the retina also occurs as a congenital stationary condition. Two cases of the former and three of the latter are presented below. Evidence is given that both forms of pigmentation may be due ...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of Medicine
سال: 1917
ISSN: 0035-9157
DOI: 10.1177/003591571701001601