a. During a typical day in the past month, how often did your eyes feel discomfort?*

b. When your eyes felt discomfort, how intense was this feeling of discomfort at the end of the day, within two hours of going to bed?*

a. During a typical day in the past month, how often did your eyes feel dry?*

b. When your eyes felt dry, how intense was this feeling of dryness at the end of the day, within two hours of going to bed?*

During a typical day in the past month, how often did your eyes look or feel excessively watery?*

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Dry Eye Questionnaire