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Vision Res. 2007 Dec;47(28):3434-46.

Visually-guided behavior of homonymous hemianopes in a naturalistic task.

Author information

  • 1Department of Ophthalmology, University of Rochester Medical Center, Rochester, NY 14642, USA. tmartin@cvs.rochester.edu

Abstract

The gaze behavior of homonymous hemianopes differs from that of visually intact observers when performing simple laboratory tasks. To test whether such compensatory behavior is also evident during naturalistic tasks, we analyzed the gaze patterns of three long-standing hemianopes and four visually intact controls while they assembled wooden models. No significant differences in task performance, saccade dynamics or spatial distribution of gaze were observed. Hemianopes made more look-ahead fixations than controls and their gaze sequences were less predictable. Thus hemianopes displayed none of the compensatory gaze strategies seen in laboratory tasks. Instead, their gaze patterns suggest greater updating of, and greater reliance on a spatial representation.

PMID:
18053848
[PubMed - indexed for MEDLINE]
PMCID:
PMC2725520
Free PMC Article
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