Evaluation of a new quantitative technique to assess the number and extent of preferred retinal loci in macular disease

M D Crossland, M Sims, R F Galbraith, G S Rubin

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

Patients with scotomas due to macular disease may use more than one preferred retinal locus (PRL) for fixation. We have developed and evaluated an objective, quantitative technique to determine the number of PRLs used during an episode of fixation and the extent of each locus. In five of eight adults with macular disease our techniques consistently indicated the presence of multiple PRLs. Patients with multiple PRLs were more likely to have suffered recent vision loss in the tested eye. Our technique describes fixation more fully than the traditional method of calculating a single bivariate contour ellipse area.

Original languageEnglish
Pages (from-to)1537-46
Number of pages10
JournalVision Research
Volume44
Issue number13
DOIs
Publication statusPublished - 2004

Keywords

  • Adult
  • Aged
  • Analysis of Variance
  • Female
  • Fixation, Ocular/physiology
  • Humans
  • Macular Degeneration/physiopathology
  • Male
  • Regression Analysis
  • Retina/physiopathology
  • Vision Tests

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