optic disc

(redirected from Optic nerve head)
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Related to Optic nerve head: Optic Nerve Head Drusen

op·tic disc

[TA]
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;
Farlex Partner Medical Dictionary © Farlex 2012

op·tic disc

(op'tik disk) [TA]
An oval area of the ocular fundus devoid of light receptors where the axons of the retinal ganglion cells converge to form the optic nerve head.
Synonym(s): discus nervi optici [TA] , blind spot (3) , optic papilla.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

optic disc

The small circular area at the back of the eye at which all the nerve fibres from the retina come together to form the optic nerve.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
d) Tilted optic nerve head with area of associated peripapillary atrophy
Caption: Figure 7: Optic nerve head optical coherence tomography showing significant optic nerve head edema bilaterally.
Maeno, "Pulsewave analysis of optic nerve head circulation is significantly correlated with brachial-ankle pulse-wave velocity, carotid intima-media thickness, and age," Graefe's Archive for Clinical and Experimental Ophthalmology, vol.
[34] found time-dependent expressions and localization of A[beta] in the retina as well as in the optic nerve head after chronic IOP elevation.
Thus, each quadrant of the circular area around the optic nerve head was given a color code (green, normal; yellow, borderline; red, thin).
There was a generalized but mild vascular attenuation with decrease in number and size of retinal vessels and pigmentary changes along with circular and atrophied optic disc with scalloped or indistinct borders and early loss of myelin over the optic nerve head. Fundus changes were not detected in any of the examined dog below 4 years of age (n=3) though the owners had complaints regarding their dog showing signs of fear in dark.
M.: Model-based Optic Nerve Head Segmentation on Retinal Fundus Images.
His optician then carried out a series of tests which revealed the young schoolboy had a swelling of the optic nerve head.
Finally, in line with the concept described above that complex I-dysfunction and elevated ROS level also apply to glaucoma [43], a recent preclinical study showed that idebenone reduced oxidant-induced cell death in human optic nerve head astrocytes from glaucoma patients [57].
[2] The large accumulation of mitochondria within the optic nerve head is mostly responsible for its energy supply.