optic disc


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Related to optic disc: optic cup, macula, macula lutea

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;

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.

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.
References in periodicals archive ?
In fundus examination, left optic disc edema had disappeared, whereas the juxtapapillary active lesion resolved without any retinochoroiditis pigmented scar (Figure 5b).
[5] Anaemia and raised intracranial pressure in Malaria can cause optic disc oedema.
In diurnal raptors, the RGC density for both temporo-nasal and dorso-nasal directions showed a Gaussian trend, with highest values at the level of the optic disc (T3, N3, D3, V3) in the buzzard retina.
The angles between the axis connecting the fovea center and optic disc center and the horizontal axis passing through the disc center (FoDi angle, automatically provided in the OCT output) were recorded.
Optic disc evaluation by slit lamp biomicroscopy or photography is subjective and causes interobserver variability.
Genes affecting optic nerve quantitative traits such as optic disc area and VCDR may have a plausible role in pathogenesis of POAG by affecting developmental-related pathways [20].
Optic Disc. Eye fundus plays an important role in detecting various eye diseases; it consists of retina which is the transparent, light-sensitive structure at the back of the eye, optic nerve disc, and blood vessels (retinal arteries and veins).
The existing works mainly use features such as intensity, appearance, and shape to locate the position of the optic disc. Sinthanayothin et al.
The results show that the proposed approach can objectively classify the glaucomatous optic disc shape with FS and NN by using quantified ocular parameters obtained from ophthalmic examination equipment.
The Angio Disc protocol uses a flow density analysis tool for the optic disc and peripapillary retina.
For each goat, tapetal color, tapetal reflectivity, shape of tapetal area, homogenicity of tapetum, junction of tapetal and non tapetal border and location, colour, shape, border and degree of myelination of optic disc or retinal endothelium were evaluated.