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Superior vs Temporal Laser Peripheral Iridotomy in Primary Angle Closure Suspects (PACS)

NCT04741919 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 200

Last updated 2023-04-11

No results posted yet for this study

Summary

Basic Study Design: Prospective, randomized, single-center, single-blinded study to compare dysphotopsias and pain recollection immediately 2 weeks, and 3 months after LPI in PACS patients who have a clear indication for bilateral LPI. Our null hypothesis is that there is no difference in dysphotopsia or pain levels by LPI position. Our alternate hypothesis is that there are more dysphotopsias superiorly and more pain temporally.

Conditions

  • Primary Angle Glaucoma Closure Suspect

Interventions

PROCEDURE

Yag Laser peripheral Iridotomy

Laser peripheral iridotomy will be performed using neo-dynium:yttrium:aluminium-garnet laser after pretreatment with 2% pilocarpine and brimonidine 0.15%. Superior LPIs will be placed between the 11- and 1-o'clock positions such that they were covered completely by the upper eyelid; nasal/temporal LPIs will be placed between the 2- and 4-o'clock positions or the 8- and 10-o'clock positions such that they were completely clear of the lid margin. Preference will be given to iris crypts, avoiding iris vessels when possible. Laser peripheral iridotomies will be performed in both eyes during the same visit and will be confirmed to be patent after the procedure. Intraoperative data collected will include initial per-shot laser energy in milli joules, number of laser shots, and total laser energy in millijoules. All the patients will be treated with flurometholone 0.1% eye drops QID for 5 days after surgery.

Sponsors & Collaborators

  • Sunnybrook Health Sciences Centre

    lead OTHER

Principal Investigators

  • Catherine Birt, MD, FRCSC · Sunnybrook

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2020-11-25
Primary Completion
2023-12-31
Completion
2024-12-31

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 NCT04741919 on ClinicalTrials.gov