A Patient Questionnaire Approach to Estimating the Prevalence of Dry Eye Symptoms in Patients Presenting to Optometric Practices across Canada

  title={A Patient Questionnaire Approach to Estimating the Prevalence of Dry Eye Symptoms in Patients Presenting to Optometric Practices across Canada},
  author={Michael J. Doughty and Desmond Fonn and Doris Richter and Trefford L. Simpson and Barbara E. Caffery and Keith C. Gordon},
  journal={Optometry and Vision Science},
Objective. To collect questionnaire data from patients in a large clinical population that would allow for an estimate of the prevalence of self-reported symptoms of dry eyes. Methods. A 13-point questionnaire (The Canada Dry Eye Epidemiology Study, CANDEES) was mailed to all optometric practices in Canada in October 1994, with the request that it be completed by 30 successive nonselected patients. Results. Four hundred fifty sets of questionnaires (total, 13,517) were analyzed (a 15.7% return… 
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