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Seeing Perceiving. 2012;25(5):471-92.

Eye movements in patients with glaucoma when viewing images of everyday scenes.

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1
Department of Optometry and Visual Science, City University London, London, EC1V 0HB, UK.

Abstract

This study tests the hypothesis that patients with bilateral glaucoma exhibit different eye movements compared to normally-sighted people when viewing computer displayed photographs of everyday scenes. Thirty glaucomatous patients and 30 age-related controls with normal vision viewed images on a computer monitor whilst eye movements were simultaneously recorded using an eye tracking system. The patients demonstrated a significant reduction in the average number of saccades compared to controls (P = 0.02; mean reduction of 7% (95% confidence interval (CI): 3-11%)). There was no difference in average saccade amplitude between groups but there was between-person variability in patients. The average elliptical region scanned by the patients by a bivariate contour ellipse area (BCEA) analysis, was more restricted compared to controls (P = 0.004; mean reduction of 23% (95% (CI): 11-35%)). A novel analysis mapping areas of interest in the images indicated a weak association between severity of functional deficit and a tendency to not view regions typically viewed by the controls. In conclusion, some eye movements in some patients with bilateral glaucomatous defects differ from normal-sighted people of a similar age when viewing images of everyday scenes, providing evidence for a potential new window for looking into the functional consequences of the disease.

PMID:
23193606
[Indexed for MEDLINE]
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