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Dysphotopsia Following Laser Peripheral Iridotomy

NCT01758237 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 214

Last updated 2013-02-13

No results posted yet for this study

Summary

To establish the correlation of the location of the Nd:YAG laser peripheral iridotomy to the post operative visual symptoms experienced by some patients. The investigators hypothesize that fully uncovered laser peripheral iridotomy will produce less significant dysphotopsia, due to avoidance of the prismatic effect produced by the tear film than those covered.

Conditions

  • Narrow Angle Patients at Risk for Angle Closure Glaucoma

Interventions

DEVICE

Neodymium-doped: Yttrium Aluminum Garnet (Nd:YAG) laser

This device is used to perform the peripheral iridotomy on all patients. It is a standard of care approved device.

PROCEDURE

Nd:YAG Laser Peripheral Iridotomy

After application of topical anesthetic to the eye undergoing the LPI, the patient is seated at the laser machine. Abraham iridotomy lens filled with a viscous material will be used to facilitate the procedure. The thinnest area of the iris quadrant treated will be chosen. Nd:YAG Laser will be applied until iridotomy is opened satisfactory.

Sponsors & Collaborators

  • Credit Valley EyeCare

    lead INDUSTRY

Principal Investigators

  • Iqbal Ike K Ahmed, MD · University of Toronto, Toronto, Canada. University of Utah, Salt Lake City, USA

  • Vanessa Vera, MD · University of Toronto, Canada

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2008-01-31
Primary Completion
2009-01-31
Completion
2009-01-31

Countries

  • Canada

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01758237 on ClinicalTrials.gov