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...

Effects of Weight Loss From Bariatric Surgery on Intraocular Pressure (IOP) (IOP)

This study has been withdrawn prior to enrollment.
Information provided by (Responsible Party):
Robert Feldman, The University of Texas Health Science Center, Houston Identifier:
First received: February 4, 2009
Last updated: December 4, 2015
Last verified: December 2015
The purpose of this study is to determine if there is an effect on the eye pressure from extreme weight loss by bariatric procedures. The hypothesis is that excess fat in the orbit of the eye compresses on the outflow system, which causes an elevated eye pressure. This can have many consequences, including the risk for glaucoma. We hope to establish if there is an effect between eye pressure and weight.

Intraocular Pressure

Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: The Effects of Weight Loss From Bariatric Surgery on Intraocular Pressure

Resource links provided by NLM:

Further study details as provided by The University of Texas Health Science Center, Houston:

Primary Outcome Measures:
  • Intraocular pressure [ Time Frame: Data will be recorded the same day when a patient comes to the clinic. ]

Enrollment: 0
Study Start Date: September 2010
Estimated Study Completion Date: September 2010
Estimated Primary Completion Date: September 2010 (Final data collection date for primary outcome measure)
Study group-Bariatric procedure performed
Control group: No bariatric procedures


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Patients who are included in this study will have been evaluated for bariatric surgery and will meet the current eligibility requirements for bariatric surgery. These requirements include that the patient must have failed dietary therapy and have a BMI(body mass index) greater than 40 kg/m2 without associated comorbidities or have a BMI greater than 35 kg/m2 with associated comorbidities. Eleven subjects who will be evaluated for bariatric surgery but choose not to undergo the surgery will be recruited to serve as controls and to verify the changes in intraocular pressure (IOP) are due to the weight loss. It is expected that the IOP of the control patients will be relatively stable, assuming the patients will not have any other surgery or intervention which could affect the IOP.

Inclusion Criteria:

  • Age ≥ 18
  • Written informed consent obtained
  • BMI > 40 kg/m2 without associated comorbidities or > 35 kg/m2 with associated comorbidities. In the normal indication for routine bariatric surgery, comorbidities include hypertension, type II diabetes, venous stasis, sleep apnea, polycystic ovary syndrome, pseudotumor cerebri, nonalcoholic steatohepatitis, gastroesophageal reflux disease, coronary artery disease, degenerative joint disease, cancer, and hypercholesterolemia.

Exclusion Criteria:

  • Current use of systemic steroids
  • Any systemic medication which is unstable and can affect IOP
  • History or evidence of glaucoma
  • Any ocular trauma or ocular surgery
  • Outside normal range of corneal thickness (500-600 microns)
  • Unable to follow-up for 3 years
  • Participating in any investigational device or medication study within 30 days of baseline
  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: NCT00837226

United States, Texas
Minimally Invasive Surgeons of Texas
Bellaire, Texas, United States, 77401
Sponsors and Collaborators
The University of Texas Health Science Center, Houston
Principal Investigator: Robert Feldman, M.D. The University of Texas Health Science Center, Houston
  More Information

Responsible Party: Robert Feldman, ◦Clinical Professor and Chair and Richard S. Ruiz, M.D., Distinguished University Chair in Ophthalmology, The University of Texas Health Science Center, Houston Identifier: NCT00837226     History of Changes
Other Study ID Numbers: 08-0499
Study First Received: February 4, 2009
Last Updated: December 4, 2015

Additional relevant MeSH terms:
Weight Loss
Body Weight Changes
Body Weight
Signs and Symptoms processed this record on May 22, 2017