optic disc

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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 ?
VA is reduced or normal and the optic discs appear severely hyperaemic and moderately elevated with indistinct margins, which may be asymmetric initially.
b) If a patient has normal IOP but has optic discs that are suspicious of glaucoma
However, there is a potential compensating factor because large optic discs tend to have more optic nerve fibres, giving them some nerve fibres in reserve i.
Which one of the following BEST describes the appearances of the optic discs shown in Image B?
This article does not intend to delve into the detection of glaucomatous optic discs, as this has been dealt with elsewhere in this series (see Optometry Today, June 3 2011).
At the first 6-monthlv review, the optic discs appeared similar but visual fields showed an increasing glaucomatous defect in both eyes (Figure 4) and IOP, while still normal, was higher than at the initial visit (RE=20mmHg LE=19mmHg), Based on this change in clinical picture, the decision was made to commence treatment and the patient was happy with this.
A CLINICAL group at Moorfields Eye Hospital are about to invite practitioners to participate in a study examining the ability of UK optometrists to assess glaucomatous optic discs.
Determination of glaucomatous changes can be difficult in cases with highly tilted optic discs or where there is an adjacent posterior staphyloma.
The optic discs were normal in size in both eyes and showed a cup to disc (CD) ratio of 0.
5% of all optic discs, whilst the GDx VCC and HRT devices accurately diagnosed 93.
Conversely, large optic discs may appear to show little change in the NRR distribution in the presence of progressive glaucoma.
Her research showed that large optic discs tend to produce false positives and that small optic discs need extra care as early glaucoma damage could be missed - a useful tip for interpreting HRT data.