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  • Title: Optic disc duplication or coloboma?
    Author: Islam N, Best J, Mehta JS, Sivakumar S, Plant GT, Hoyt WF.
    Journal: Br J Ophthalmol; 2005 Jan; 89(1):26-9. PubMed ID: 15615741.
    Abstract:
    AIM: To describe lesions resembling optic disc duplication and highlight their unusual visual fields. The authors also report the first case of pseudo-duplication of the optic disc with overlying retinal nerve fibre layer. METHODS: Retrospective, non-comparative review of case notes. Humphrey visual fields and OCT-3 imaging were performed. RESULTS: All 11 cases represented peripapillary chorioretinal coloboma, some of which lie superior to the optic disc. A double blind spot or superior hemifield defects can be demonstrated by automated visual field testing. CONCLUSION: Clinical examination and identification of bridging retinal vessels from the true optic disc to the second pseudo disc can usually avoid unnecessary invasive and non-invasive investigations.
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