Comparison of Ophthalmic Medications for Tolerability Questionnaire (COMTol)



To assess the frequency and bother of common side effects of topical drugs used to control intraocular pressure, the association between side effects or limitation in routine living activities and patient's health-related quality of life, the compliance and the satisfaction with the medication.

Targeted Population

  • Glaucoma

Copyright holder

Merck & Co., Inc., Rahway, NJ, USA


Original Language(s)

  • English for the USA

List of Translations


  • Hindi
  • Finnish
  • Spanish
  • Russian
  • Telugu

Conditions of use

License agreement needed

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Barber BL, Strahlman ER, Laibovitz R, Guess HA, Reines SA. Validation of a questionnaire for comparing the tolerability of ophthalmic medications. Ophthalmology. 1997 Feb;104(2):334-42

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