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 کاملOptic disk size and optic disk-to-fovea distance in preterm and full-term infants.
PURPOSE Few studies have assessed optic disk and retinal morphology in infants. Here the optic disk and optic disk-to-fovea distance were measured in preterm and full-term infants in vivo. METHODS Optic disk (OD) dimensions and the center-to-center distance between the OD and the macula were measured using digital imaging in infants undergoing routine ophthalmic examinations. Postmenstrual ag...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1952
ISSN: 0007-1161
DOI: 10.1136/bjo.36.8.447