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Letter
The Pulfrich phenomenon in optic disc drusen
  1. Gael E Gordon1,
  2. Gordon Heron1,
  3. Gordon N Dutton1,2
  1. 1
    Department of Vision Sciences, Glasgow Caledonian University, Glasgow, UK
  2. 2
    Tennent Institute of Ophthalmology, Gartnavel General Hospital, Glasgow, UK
  1. Dr Gael Gordon, PhD, Department of Vision Sciences, Glasgow Caledonian University, Cowcaddens Road, Glasgow G4 0BA, UK; G.Gordon{at}gcal.ac.uk

https://doi.org/10.1136/bjo.2007.119727

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    Optic disc drusen are hyaline bodies in the optic nerve head of unknown aetiology,1 which are present in approximately 2% of the population.2 Reduced visual acuity associated with optic disc drusen is rare, although visual field defects are common in cases of visible drusen.3 4 Although the condition is frequently bilateral, asymmetry is usual.5 We report a case of a patient with disabling visual symptoms associated with optic disc drusen. These were found to result from the Pulfrich phenomenon and were resolved by prescribing an appropriate ophthalmic tint.

    Case report

    A 20-year-old woman was seen in our optometry clinic and subsequently examined by a consultant ophthalmologist. She was moderately myopic, with good visual acuities (6/5 OU), no history of ocular disease and showed no symptoms …

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    Footnotes

    • Competing interests: None.