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Optom Vis Sci. 2000 Jan;77(1):25-33.

Eye movements and reading with plus-lens magnifiers.

Author information

  • 1Department of Vision Sciences, Glasgow Caledonian University, United Kingdom. a.bowers@gcal.ac.uk

Abstract

PURPOSE:

This study aimed to determine the eye movement parameter(s) that is primarily affected when fully sighted subjects use plus-lens magnifiers for reading.

METHODS:

Two forms of plus-lens magnifier were used: hand-held and spectacle-mounted. Eye movements were recorded using an infrared limbal reflection system as subjects read passages of text with and without the magnifiers. Data were compared for a young age group and an elderly (education-matched) age group.

RESULTS:

For both age groups, a sawtooth pattern of eye movements was observed and reading speed was significantly (p = 0.0001) reduced when using the magnifiers compared with reading without. Forward saccade length decreased significantly (p = 0.0001) and time for retrace increased significantly (p = 0.0001), but fixation durations were unaffected. The form of magnifier had no significant effect on reading speed or eye movement parameters.

CONCLUSIONS:

The reduction in reading speed that occurred when using the plus-lens magnifiers was primarily a result of decreased forward saccade length.

PMID:
10654855
[PubMed - indexed for MEDLINE]
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