ClinicalTrials.gg
CompletedNCT03097562CATALYSUpdated Feb 25, 2021

Wound Architecture and Functional Outcome After Cataract Surgery With Manual vs.Femtosecond Laser Assisted Procedures

An interventional study of Femtosecond cataract surgery in Cataract, sponsored by Maisonneuve-Rosemont Hospital. Completed at 1 site in Canada. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-02-25.

Sponsored by Maisonneuve-Rosemont Hospital · Not applicable, Interventional, and Health services research

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Phase
Not applicable
Study type
Interventional
Enrollment
1,123
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 33 studies in Cataract with a site in Canada — 3 open to participants now, 3 under way, none of them phase 3. Cataract · Canada.

Enrollment
2nd of 23
1,123 · median 68
Started
2017
with 2 others
No phase
18 of 33
1 open now
Registered
12th of 33
by date

Among the 33 studies in Cataract with a site in Canada, this one is the 2nd largest by enrollment of the 23 interventional ones that give a count, is one of 3 that started in 2017, is one of 18 with no phase, and was the 12th registered.

Cataract

1,630 studies on the registry are indexed under Cataract; 235 are open to participants now.

Browse Cataract studies →

Open to participants now

3 of the 33 studies in Cataract with a site in Canada are open now. Recruiting first, the newest first:

All 3 open studies →

A study can be open while its sites in Canada have not opened yet or have stopped. Only those recruiting at a site in Canada →

Who these studies take

Of the 142 Cataract studies recruiting now, 88 (62%) set no upper age limit and 8 (6%) stop at 75 or younger; 10 take children under 18; 16 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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02

Study summary

This study is the long term analysis of two types of FSL 3-plane corneal wound profiles, namely CT1 and CT2 obtained after a FSL cataract surgery.

Read the detailed description

Femtosecond laser cataract surgery offers several major advantages for wound construction, including high precision, repeatability and a large variety of corneal wound profiles. The aim of this study is the long term analysis of two types of FSL 3-plane corneal wound profiles, namely CT1 and CT2, CT2 being constructed with a reversed front corneal incision segment to ensure tigher wound closure and better corneal wound reapposition. The traditional manual wound performed with a standard keratome will be used as a reference. As FSL cataract surgery may be associated with a greater incidence of wound leaks at the end of surgery as compared to manual wound construction with keratomes, this study will also aim at determining wich clinical and OCT wound parameters are associated with a higher likelihood of wound leaks.

03

Conditions studied

  • Cataract

Keywords

  • Cataract
  • Femtosecond laser
  • Cornea
  • Anatomy
  • FSL
  • surgery
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Consecutive cases of cataract surgery performed between January 2015 and june 2015 by a single surgeon (PH) at the clinique d'ophtalmologie Bellevue, using either the Catalys or a manual technique.
  • One eye per patient, the first eye
  • Uneventful cataract only

Exclusion criteria

Exclusion Criteria:

  • Combined glaucoma filtering surgery
  • Any previous corneal surgery in this eye
  • Any pathology of the interior segment
  • Inflammatory eye disease of the interior segment
05

Study design

Phase
Not applicable
Primary purpose
Health services research
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
1,123 participants (actual)

Study arms

  • Experimental
    CT1

    FLACS- Initial Wound parameters (CT1) Sample size calculation based on woundleak incidence estimated from preliminary results: * For CT1 vs MT, we will only need 10 per group to have 80% power assuming a 1:1 ratio of CT to MT and 5% type 1 error. * For CT1 vs CT2, we will need 22 per group to have 80% power (assuming 60% wound leakage in CT1 and 20% wound leakage in CT2, a 1:1 ratio, and a 5% type 1 error rate) * A total of 253 patients are eligible for this study, 101 with FLACS and 152 with Manual Cataract Surgery. We thus expect that our study population will allow adequate analysis of the main outcome parameters proposed herein.

    Procedure: Femtosecond cataract surgery

  • Experimental
    CT2

    The revised profile CT2, consists of a wider anterior side cut angle (beveled corneal undercut) and a narrower posterior side cut angle compared to the initial CT1 profile. This new corneal incision profile is constructed to ensure a tigher wound closure and a better corneal wound reapposition. The traditional manual wound performed with a standard keratome wil be used as a reference.

    Procedure: Femtosecond cataract surgery

  • Active comparator
    MT control group

    Standard manual technique (MT)

    Procedure: Femtosecond cataract surgery

Interventions

  • ProcedureFemtosecond cataract surgery

    Catalys create a circular opening for accessing and removing the cataract.

    Also known as: ReLACS

06

What researchers measure

Primary outcomes

  1. Preservation of a physiological postoperative anatomy will be considered as a criterion of success

    Change in corneal anatomy as measured by the difference between pre-and postoperative corneal profile on OCT images

    Time frame: 2 Months

Secondary outcomes

  1. The absence or a lower incidence of wound leak will also be considered as a criterion of success

    Presence or not of a wound leak necessitating a 10.0 Nylon to stop the leak

    Time frame: 2 Months

07

Study locations

1 site
  • Montreal Glaucoma Institut
    Montreal, Quebec H1V 1G5, Canada
08

References and documents

Individual participant data

Plan to share: Yes — Publication of data and results in an Ophtalmology journal, conferences

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Feb 2017 to primary completion in Feb 2020, 36 months.

Of 302 non-industry interventional studies with no phase under Cataract, half reached primary completion within 18 months of starting (the median), counting those still running; a quarter within 7 and three quarters within 30. This study's 36 months is above that.

Counting every sponsor, half of 492 studies reached it within 17 months; a quarter within 9 and three quarters within 28.

How these figures are worked out, and which studies are left out of them.

Registered
Jun 10, 2016
First posted
Mar 31, 2017
StartActual
Feb 2, 2017
Primary completionActual
Feb 28, 2020
CompletionActual
Oct 1, 2020
Last update
Feb 25, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 25, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03097562
Lead sponsor
Maisonneuve-Rosemont Hospital
Responsible party
Dr. Paul Harasymowycz (Chief of Glaucoma Service University of Montreal, Maisonneuve-Rosemont Hospital) — Principal investigator
First posted
Mar 31, 2017
Start date
Feb 2, 2017
Primary completion
Feb 28, 2020
Completion
Oct 1, 2020
Last update
Feb 25, 2021

Study contacts

Paul Harasymowycz, MD
principal investigator · Ciusss de L'Est de l'Île de Montréal

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2021. You cannot join it, but the record below documents what was studied.

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