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Br J Ophthalmol 2005;89:26-29 doi:10.1136/bjo.2004.049122
  • Clinical science
    • Scientific reports

Optic disc duplication or coloboma?

  1. N Islam1,2,3,
  2. J Best2,4,
  3. J S Mehta1,
  4. S Sivakumar3,
  5. G T Plant1,2,
  6. W F Hoyt5
  1. 1Moorfields Eye Hospital, London, UK
  2. 2National Hospital for Neurology and Neurosurgery, London, UK
  3. 3Whipps Cross University Hospital Trust, London, UK
  4. 4Royal Victoria Hospital, Belfast, Ireland
  5. 5University College of San Francisco, CA, USA
  1. Correspondence to: Mr Niaz Islam Medical Retina, Moorfields Eye Hospital, City Road, London EC1V 2PD, UK; isniazyahoo.com
  • Accepted 24 June 2004

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.

Footnotes

  • Financial support: None.

  • Proprietary support: None.

  • Presentation: Poster and Rapid Fire oral, European Association for Vision and Eye Research (EVER), Alicante, Spain Oct 2003.

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