optic disk


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Related to optic disk: optic cup, fovea

optic disk

[′äp·tik ‚disk]
(neuroscience)
The circular area in the retina that is the site of the convergence of fibers from the ganglion cells of the retina to form the optic nerve.
References in periodicals archive ?
Researchers have focused on localization of optic disk using a computer, so more methods have been suggested with good results.
Agurto et al., "Fast localization and segmentation of optic disk in retinal images using directional matched filtering and level sets," IEEE Transactions on Information Technology in Biomedicine, vol.
Xiaohui Liu- "Segmentation of the Blood Vessels and Optic Disk in Retinal Images"- IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS, 18: 6.
Localization methods are based on two physiological characteristics of the optic disk. First, due to its organic composition, the region in which the OD is located corresponds to the brightest components [15].
Nandi, "Automated localisation of retinal optic disk using Hough transform", In Proc.
Conclusion: The optic disk does not appear to be the site of morphological changes in amblyopia.
PonniBala detected exudates from the fundus image by thresholding and removal of optic disk using connected components analysis.
These blue arcs follow the paths of the nerves arcing away from the edge of the fovea (where the spot of light is focused) to the optic disk and were first described by Purkinje (1825).
Most individuals with suspicious-appearing optic disks but normal visual fields are considered "glaucoma suspects." Only those in which we can detect or document a change in the optic disk do we call pre-perimetric glaucoma.
Monthly examinations of the rats revealed cupping of the optic disk at the back of the untreated eyes with glaucoma.
This paper used the automatic drusen detection method while ROI converges on circle whose radius connects from fovea to optic disk that the ophthalmologists considers important.