Status:
COMPLETED
Visual Discomfort and Reading
Lead Sponsor:
Southern California College of Optometry at Marshall B. Ketchum University
Collaborating Sponsors:
National Institutes of Health (NIH)
Conditions:
Visual Fatigue
Eligibility:
All Genders
17-30 years
Brief Summary
Reading can be an uncomfortable and difficult task for some people. Symptoms include unpleasant somatic and perceptual effects, such as eye-strain, headache, and blurred text, despite normal visual ac...
Detailed Description
Wilkins et al (1980) found that paroxysmal activity in photosensitive epileptic patients can be triggered by binocular viewing of a large repetitive striped pattern with a spatial frequency of 1-4 cyc...
Eligibility Criteria
Inclusion
- normal College age subjects with low visual discomfort scores on the Conlon visual discomfort survey.
- normal College age subjects with high visual discomfort scores on the Conlon visual discomfort survey.
Exclusion
- English as a second language, uncorrected visual defects, reading disabilities, medical conditions that might cause uncomfortable visual symptoms, strabismus, stereopsis less than 70 seconds of arc, any ocular pathology, color vision deficiency, IQ less than 90.
Key Trial Info
Start Date :
July 1 2004
Trial Type :
OBSERVATIONAL
Allocation :
ESTIMATED
End Date :
December 1 2008
Estimated Enrollment :
100 Patients enrolled
Trial Details
Trial ID
NCT00402155
Start Date
July 1 2004
End Date
December 1 2008
Last Update
November 13 2009
Active Locations (1)
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1
Claremont McKenna College
Claremont, California, United States, 91711