optic disc

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

optic disc

n
(Anatomy) a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve. See blind spot1
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.optic disc - the point where the optic nerve enters the retinaoptic disc - the point where the optic nerve enters the retina; not sensitive to light
retina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve
point - the precise location of something; a spatially limited location; "she walked to a point where she could survey the whole street"
Translations
point aveugle
References in periodicals archive ?
Intraocular pressure and the perfusion of the optic nerve head should be monitored and managed appropriately.
It discusses comparison to fluorescein angiography, terminology, and interpretation of inner and outer retinal disorders, including diseases of the optic nerve head, along with case studies of inner retinal pathology, outer retinal disease, diseases of the choroid, and optic nerve disease.
Ocular coherence tomography (Topcon 3D-2000, Topcon Corporation, Tokyo, Japan) of the left optic nerve head showed an importantly edematous optic nerve head associated with subretinal fluid around the optic disc and an important diffuse thickening of the peripapillary retinal nerve fiber layer (Figure 4).
01 What is the best description of the optic nerve head shown in the image?
The most frequently affected retinal structures or tissues seem to be those of the optic nerve head or papilla, the macular area, and the choroidal vessels (as revealed by the attendant loss of pigment).
The optic nerve head was edematous with indistinct margins and star-like macular exudates were detected in left fundus examination (Figure 1).
Neuronal death may cause permanent loss of vision by loss of retinal ganglion cells (RGCs), reduction of the peripapillary retinal nerve fiber layer (RNFL) thickness, optic nerve head imperfections, and decreased visual field (VF) sensitivity.23,24 Peripapillary RNFL thickness measurement reflects neuronal axons, and would allow quantification of ganglion cell axonal loss.
Unfortunately, DON is very difficult to diagnose in a timely fashion because its signs and symptoms (decreased visual acuity, relative afferent pupillary defect, edema of the optic nerve head, visual field defects, and color vision impairment) are often subtle and can therefore be missed if they are not screened for specifically (1,6).
Thus, it can indicate the risk for the development of glaucoma in PXS and act as a predictor for glaucoma and can help us to make the patient to undergo close followup visits, to diagnose early and treat pseudoexfoliative glaucoma better and prevent further damage to optic nerve head. This study attempts to determine the role of PCI in predicting the risk of development of glaucoma in eyes with pseudoexfoliation.
Snyder used the scanner to examine the optic nerve head and macula at both baseline and 27 months in his cohort.
Dilated funduscopic examination revealed mildmoderate optic nerve head edema with small temporal nerve fiber layer hemorrhage in the right eye and mild optic nerve head edema in the left eye as shown in Figures 3-7.
The examinations performed included dilated fundus examination with stereoscopic biomicroscopy of the optic nerve head using slit-lamp and indirect ophthalmoscopy, IOP testing, and visual acuity testing with refraction.