Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Effect of Topical Glaucoma Therapy on Tear Film Stability in Healthy Subjects

This study has been terminated.
Information provided by (Responsible Party):
Gerhard Garhofer, Medical University of Vienna Identifier:
First received: December 7, 2012
Last updated: December 1, 2016
Last verified: December 2016

Long term treatment with anti-glaucomatous drugs has been shown to increase the incidence of dry eye syndrome with all known consequences such as ocular discomfort and epithelial keratitis. Given that thinning of the tear film appears to be a risk factor for the development or the aggravation of dry eye syndrome, the current study seeks to investigate whether tear film thickness is changed after topical treatment with anti-glaucomatous drugs in healthy subjects.

For this purpose, tear film thickness will be measured at baseline and after single instillation of one of 5 study drugs in one randomly chosen eye. In addition, one group of 20 subjects will receive no drug and will serve as a second control. Drug effects on tear film thickness will be compared to the fellow, non-treated eye. In addition, effects on tear film thickness of timolol with preservatives (Timoptic 0.5%) will be compared to timolol without preservatives (Timophtal sine 0.5%) and three lubricants with different viscosity (Genteal HA, Hylo-Comod, Thealoz).

Condition Intervention Phase
Drug: Timoptic® 0.5%
Drug: Timophtal sine® 0.5%
Device: Genteal HA®
Device: Hylo-Comod®
Device: Thealoz®
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Basic Science
Official Title: Effect of Topical Glaucoma Therapy on Tear Film Stability in Healthy Subjects

Resource links provided by NLM:

Further study details as provided by Medical University of Vienna:

Primary Outcome Measures:
  • Tear film thickness [ Time Frame: up to 1 hour ]

Secondary Outcome Measures:
  • Break up time (BUT) [ Time Frame: once on the study day ]

Enrollment: 38
Study Start Date: July 2011
Study Completion Date: January 2015
Primary Completion Date: September 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: healthy subjects I
20 healthy subjects
Drug: Timoptic® 0.5%
Timoptic® 0.5% Eye Drops, Merck, single instillation
Experimental: healthy subjects II
20 healthy subjects
Drug: Timophtal sine® 0.5%
Timophtal sine® 0.5%, Agepha, Eye Drops, single instillation
Experimental: healthy subjects III
20 healthy subjects
Device: Genteal HA®
Genteal HA® Eye Drops, Novartis, single instillation
Experimental: healthy subjects IV
20 healthy subjects
Device: Hylo-Comod®
Hylo-Comod® Eye Drops, Croma-Pharma, single instillation
Experimental: healthy subjects V
20 healthy subjects
Device: Thealoz®
Thealoz® Eye Drops, Thea, France, single instillation
No Intervention: healthy subjects VI
20 healthy subjects


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Men and women aged over 18 years
  • Normal findings in the medical history and physical examination unless the investigator considers an abnormality to be clinically irrelevant
  • Normal ophthalmic findings, ametropia < 6 Dpt.

Exclusion Criteria:

  • Regular use of medication (except contraceptives), abuse of alcoholic beverages, participation in a clinical trial in the 3 weeks preceding the study
  • Treatment in the previous 3 weeks with any drug
  • Symptoms of a clinically relevant illness in the 3 weeks before the first study day
  • Patients with known hypersensitivity to the study drug or any ingredients
  • History or current COPD or asthma
  • AV-block grade II or more
  • Ametropy ≥ 6 Dpt
  • Pregnancy
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01746602

Department of Clinical Pharmacology, Medical University of Vienna
Vienna, Austria, 1090
Sponsors and Collaborators
Medical University of Vienna
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Gerhard Garhofer, Assoc. Prof. PD Dr., Medical University of Vienna Identifier: NCT01746602     History of Changes
Other Study ID Numbers: OPHT-241010
Study First Received: December 7, 2012
Last Updated: December 1, 2016

Keywords provided by Medical University of Vienna:
topical lubricants
tear film thickness
anti-glaucoma drugs
break up time
anti-glaucoma treatment

Additional relevant MeSH terms:
Ocular Hypertension
Eye Diseases
Adrenergic beta-Antagonists
Adrenergic Antagonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Anti-Arrhythmia Agents
Antihypertensive Agents processed this record on May 22, 2017