optic disk

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Related to optic disk: optic cup, fovea

disk

[disk]

a circular or rounded flat plate; often spelled disc in names of anatomic structures.

articular disk a pad of fibrocartilage or dense fibrous tissue present in some synovial joints.

Bowman's disk one of the flat plates making up a striated muscle fiber.

choked disk papilledema.

ciliary disk pars plana.

embryonic disk (germ disk) (germinal disk) a flattened round bilaminar plate of cells in the blastocyst of a mammal, where the first traces of the embryo are seen; called also embryonic or germinal area.

herniated disk see herniated disk.

intervertebral disk the layer of fibrocartilage between the bodies of adjoining vertebrae; see also herniated disk.

intra-articular d's articular disk.

Merkel's d's small cup-shaped tactile receptors in the skin that are particularly sensitive to continuous pressure.

optic disk the intraocular part of the optic nerve formed by fibers converging from the retina and appearing as a pink to white disk in the retina; there are no sensory receptors in the region and hence no response to stimuli. Called also blind spot.

ruptured disk herniated disk.

slipped disk popular term for herniated disk.

optic disk

n. Anatomy

See blind spot.

Optic disk

The small area in the retina where the optic nerve enters the eye that is not sensitive to light. Also called the blind spot.

Mentioned in: Retinal Vein Occlusion

Mariotte,

Edmé, French physicist, 1620-1684.

Mariotte blind spot - an oval area of the ocular fundus devoid of light receptors where the axons of the retinal ganglion cell converge to form the optic nerve head. Synonym(s): optic disk

Mariotte bottle - a stoppered bottle with bottom outlet, used as a reservoir for constant infusions.

Mariotte experiment - an experiment that proves the absence of photoreceptors where the optic nerve enters the eye.

Mariotte law - Synonym(s): Boyle law

References in periodicals archive ?

Butt, "Retinal Images: Optic Disk Localizationand Detection," in Proceedings of the International Conference Image Analysis and Recognition (ICIAR '10), vol.

Localizing Optic Disc in Retinal Image Automatically with Entropy Based Algorithm

Chutatape, "Automatic location of optic disk in retinal images," in Proceedings of the 2001 International Conference on Image Processing, pp.

Automatic Optic Disc Detection in Color Retinal Images by Local Feature Spectrum Analysis

Another physiological characteristic is that all vessels and sanguine branches originate in the optic disk. It is known that these branches follow parabolic trajectories that converge to the OD.

Estrategia evolutiva basada en GPU para la deteccion del disco optico en imagenes de retina

Marinho, "Segmentation of the optic disk in color eye fundus images using an adaptive morphological approach", Comput Biol Med, vol.

An Automatic Optic Disk Detection and Segmentation System using Multi-level Thresholding

Heidelberg Retina Tomograph (HRT) has been extensively used to study the optic disk characteristics.

Analysis of retinal nerve fibre layer changes in anisometropic amblyopia by Heidelberg retina tomograph

Morphology and templates are evaluated to remove the optic disk and blood vessels.

Computerized Exudate Detection in Fundus Images Using Statistical Feature based Fuzzy C-mean Clustering

You can locate the optic disk by noting where the blood vessels originate or the blue arcs terminate in Activities 6 and 10, respectively If you keep one eye closed and blink with the other eye while looking at a uniformly illuminated surface (such as the inner surface of a ping pong ball cut in half to fit over the eye), you may see a gray disk at the location of the optic disk (Palmer, 1991).

Exploring the anatomy of your own eye

In the subtract image, result is determined by blood vessel, optic disk, background, and drusen.

Automated Segmentation Methods of Drusen to Diagnose Age-Related Macular Degeneration Screening in Retinal Images

(c) Fundus pictures (right eye on the left and left eye on the right) of patient number 8 showing swelling of the retinal nerve fibers involving the superior and inferior arcades around the optic disk, as well as retinal vessel tortuosity.

Analysis of Visual Field Defects Obtained with Semiautomated Kinetic Perimetry in Patients with Leber Hereditary Optic Neuropathy

Comparison of optic disk and retinal nerve fiber layer thickness in non glaucomatous and glaucomatous patients with high myopia.

EFFECT OF AXIAL LENGTH ON PERIPAPILLARY RETINAL NERVE FIBRE LAYER THICKNESS MEASURED BY SPECTRAL DOMAIN OPTICAL COHERENCE TOMOGRAPHY

Macular schisis in a patient without an optic disk pit optical coherence tomographic findings.

Three-dimensional optical coherence tomography imaging and treatment of glaucomatous optic nerve head defects associated with schisis-like maculopathy

Optic disc pit (ODP) is a rare congenital optic disk abnormality with an incidence of 1/11,000.