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Br J Ophthalmol 2008;92:577-578 doi:10.1136/bjo.2007.126979
  • Letter
    • PostScript

Positive angle kappa: a confounding variable in the diagnostic testing of patients with albinism

  1. M C Brodsky
  1. M C Brodsky, Department of Ophthalmology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA; brodsky.michaelc{at}mayo.edu
  • Accepted 29 June 2007

I enjoyed the recent study in which Hoffman et al performed static perimetry in patients with albinism.1 The goal of this study was to determine whether the abnormal crossed projection of temporal retina exhibits decreased sensitivity in humans with albinism, as has been suggested by previous studies.2 The authors found no diminution in retinal sensitivity corresponding to this retinal region, suggesting that humans with albinism maintain a continuous representation of visual space.

The purpose of this letter is not to critique this excellent study, but to provide a cautionary note about the interpretation of visual fields in …

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