TearLab Refractive Surgery Dry Eye Study

This study has been completed.
TLC Laser Eye Centers
Abbott Medical Optics
Information provided by (Responsible Party):
TearLab Corporation
ClinicalTrials.gov Identifier:
First received: August 3, 2010
Last updated: December 14, 2011
Last verified: December 2011

The primary objective of this study is to determine how pre & post-operative tear osmolarity levels relate to rates of dry eye symptoms related to refractive surgery and if differences exist in patients who are pre-treated with ocular lubricants vs. those treated only post-operatively.

Condition Phase
Dry Eye Disease
Phase 4

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Measurement of Refractive Surgery Induced Dry Eye Using Tear Osmolarity Testing

Resource links provided by NLM:

Further study details as provided by TearLab Corporation:

Primary Outcome Measures:
  • Relation of pre & post-operative tear osmolarity levels to dry eye and dry eye symptoms in refractive surgery [ Time Frame: 6 months post surgery ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • To determine if differences exist in patients who are pre-treated with ocular lubricants vs. those treated only post-operatively [ Time Frame: 6 months post-surgical ] [ Designated as safety issue: No ]
  • To determine if tear osmolarity levels relate to visual acuity outcomes related to refractive surgery [ Time Frame: 6 months post-surgical ] [ Designated as safety issue: No ]

Enrollment: 128
Study Start Date: June 2010
Study Completion Date: December 2011
Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Pre-surgical treatment
Patients who are pre & post-surgical treated with ocular lubricants.
Non-presurgical treatment
Patients who are only post-surgical treated with ocular lubricants


Ages Eligible for Study:   21 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Patients scheduled to undergo refractive surgery with no previous diagnosis of dry eye disease.


Inclusion Criteria:

  • Male or female, twenty-one years of age or older.
  • Confirmed diagnosis of refractive error receiving LASIK surgery.
  • Patient motivation and willingness to cooperate with the investigator and ability to return for all visits during the study.

Exclusion Criteria:

  • Compromised cognitive ability that may be expected to interfere with study compliance.
  • Clinically significant eyelid deformity or eyelid movement disorder that is caused by conditions such as notch deformity, incomplete lid closure, entropion, ectropion, hordeola or chalazia.
  • Previous ocular disease leaving sequelae or requiring current topical eye therapy other than for DED, including, but not limited to: active corneal or conjunctival infection of the eye and ocular surface scarring.
  • Active ocular allergy
  • Patients requiring punctual occlusion prior to surgery
  • Patients requiring cyclosporine ophthalmic emulsion prior to surgery
  • Standard exclusion criteria for refractive surgery used by each surgeon.
  • Known hypersensitivity to any of the agents used in testing
  • Ophthalmologic drop use within 2 hours of any visit
  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 ClinicalTrials.gov identifier: NCT01176045

United States, Connecticut
Connecticut TLC
Fairfield, Connecticut, United States, 06824
United States, Illinois
Westchester TLC
Westchester, Illinois, United States, 60154
United States, Oklahoma
Oklahoma City TLC
Oklahoma City, Oklahoma, United States, 73116
Tulsa TLC
Tulsa, Oklahoma, United States, 74133
United States, Pennsylvania
Kremer Eye Center
King of Prussia, Pennsylvania, United States, 16406
United States, Texas
San Antonio TLC
San Antonio, Texas, United States, 78232
United States, Utah
Salt Lake City TLC
Salt Lake City, Utah, United States, 84121
United States, Virginia
Reston TLC
Reston, Virginia, United States, 20191
Sponsors and Collaborators
TearLab Corporation
TLC Laser Eye Centers
Abbott Medical Optics
Study Director: James Owen, OD TLC The Laser Eye Center
  More Information

No publications provided

Responsible Party: TearLab Corporation
ClinicalTrials.gov Identifier: NCT01176045     History of Changes
Other Study ID Numbers: TP00087
Study First Received: August 3, 2010
Last Updated: December 14, 2011
Health Authority: United States: Institutional Review Board

Keywords provided by TearLab Corporation:
Dry Eye Disease
Refractive Surgery

ClinicalTrials.gov processed this record on March 31, 2015