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Evaluation of Pascal Laser Trabeculoplaty (PLT)

This study has been completed.
OptiMedica Corporation
Information provided by (Responsible Party):
Santa Clara Valley Health & Hospital System Identifier:
First received: February 5, 2009
Last updated: October 12, 2016
Last verified: February 2009
Laser Trabeculoplasty has been shown to be effective in lowering intraocular pressure (IOP) in patients with primary open-angle glaucoma (POAG). Although initially demonstrated with the Argon laser (ALT), several other laser systems have also been employed with comparable efficacy. Recently, Selective Laser Trabeculoplasty (SLT) has been shown to lower intraocular pressure comparable to ALT. The advantage of SLT is that the target eye structure, the trabecular meshwork, remains intact with minimal damage at the cellular level. In contrast, ALT lowers IOP at the expense of scarring of the trabecular meshwork. The purpose of this study is to evaluate the efficacy of lowering IOP with Pascal Laser Trabeculoplasty (PLT) employing reduced energy levels compared to ALT and a computer guided pattern of laser treatment applications.

Condition Intervention
Open Angle Glaucoma Ocular Hypertension Other: laser trabeculoplasty

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Prospective Evaluation of the Efficacy of Pascal Trabeculoplasty: A Pilot Study

Resource links provided by NLM:

Further study details as provided by Santa Clara Valley Health & Hospital System:

Primary Outcome Measures:
  • intraocular pressure [ Time Frame: 1 week, 1 month, 3 months, 6 months, 9 months and 1 year after treatment ]

Enrollment: 50
Study Start Date: March 2008
Study Completion Date: March 2010
Primary Completion Date: March 2010 (Final data collection date for primary outcome measure)
Intervention Details:
    Other: laser trabeculoplasty
    Deliver laser energy to the trabecular meshwork using the Pascal Laser System

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Otherwise healthy males and females, older than 18 years of age with two (2) sighted eyes
  2. Have OAG, PXG, or combined mechanism glaucoma - as long as their angles are open
  3. Have uncontrolled IOP (>24mmHg); or controlled with Medicine(s)
  4. If on medical treatment, have undergone a washout period of at least one month prior to Pascal treatment
  5. Able and willing to comply with the treatment/follow-up schedule and requirements;
  6. Able to provide written informed consent

Exclusion Criteria:

  1. Pregnant, intending to become pregnant during course of study, less than 3 months postpartum or less than 6 weeks after completion of breastfeeding
  2. Have an advanced visual field defect within 10° of fixation
  3. Have had previous glaucoma surgery, except for peripheral iridotomy
  4. Have corneal disease obviating the use of corneal applanation for a reliable IOP measurement, or would cause difficulty in viewing the TM by means of gonioscopic lens
  5. Using systemic steroids
  6. Participation in a study of another device or drug within 3 month prior to study enrollment or during this study, and as per the Investigator's careful discretion, as long as not contradictory to any of the above criteria
  7. Any condition which, in the Investigator's opinion, would make it unsafe (for the subject or for the study personnel) to treat the subject as part of this research study
  8. No concomitant use of IOP lowering medicine (Group 1)
  9. No co-existing ocular pathology with the exception of Cataract.
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Please refer to this study by its identifier: NCT00838721

United States, California
Santa Clara Valley Medical Center
San Jose, California, United States, 95128
Sponsors and Collaborators
Santa Clara Valley Health & Hospital System
OptiMedica Corporation
Principal Investigator: Christopher J Engelman, MD Santa Clara Valley Medical Center
  More Information

Responsible Party: Santa Clara Valley Health & Hospital System Identifier: NCT00838721     History of Changes
Other Study ID Numbers: PASCAL-1
Study First Received: February 5, 2009
Last Updated: October 12, 2016

Keywords provided by Santa Clara Valley Health & Hospital System:
Open Angle Glaucoma
Ocular Hypertension
Laser Trabeculoplasty

Additional relevant MeSH terms:
Glaucoma, Open-Angle
Ocular Hypertension
Vascular Diseases
Cardiovascular Diseases
Eye Diseases processed this record on July 21, 2017