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TerminatedNCT01956474Updated Oct 12, 2018

CXL-04 A Study of Collagen Crosslinking With Ultraviolet-A in Asymmetric Corneas

A Phase 2 interventional study of Theralight crosslinking and Riboflavin in Keratoconus, sponsored by Cxlusa. Terminated at 6 sites in United States. Open to participants aged 8 Years and older. Per ClinicalTrials.gov, last updated 2018-10-12.

Sponsored by Cxlusa · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
1,324
Allocation
Not applicable
Ages
8 Years and older
Sex
All
01

Study summary

The purpose of this study is to evaluate the efficacy of ultraviolet-A (UVA)-induced cross-linking of corneal collagen (CXL) as a method to increase the biomechanical and biochemical stability of the cornea by inducing additional cross-links within or between collagen fibers using UVA light and the photo- mediator riboflavin.

Read the detailed description

This study will evaluate the results of Corneal Collagen Crosslinking (CXL) in patients with conditions that include Keratoconus, Pellucid Marginal degeneration, Post-LASIK ectasia, and patients with radial keratotomy who experience fluctuation in their vision. This is an outcomes study, all patients receive treatment.

02

Conditions studied

  • Keratoconus

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Keywords

  • keratoconus
  • cross-linking
  • Post-LASIK ectasia
  • Pellucid marginal degeneration
  • Forme fruste pellucid marginal degeneration
  • FFKC
  • Radial Keratotomy
  • Terrien's Marginal Degeneration
03

In context

Keratoconus

307 studies on the registry are indexed under Keratoconus; 56 are open to participants now.

This study's enrollment of 1,324 is above the median of 40 across 203 interventional studies indexed under Keratoconus.

Browse Keratoconus studies →

Lead sponsor

Cxlusa is the lead sponsor of 7 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

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

Inclusion criteria

  1. 8 years of age or older
  2. Having at least one of the following conditions:

    • Keratoconus
    • Post-LASIK ectasia
    • Pellucid marginal degeneration
    • Forme fruste pellucid marginal degeneration
    • FFKC
    • History of Radial Keratotomy with fluctuating vision.
    • Terrien's Marginal Degeneration
  3. Signed written informed consent and/or assent
  4. Likely to complete all study visits
  5. Minimum corneal thickness of at least 250 microns measured by ultrasound or Pentacam for all indications other than Terrien's. For Terrien's, the minimal corneal thickness should be consistent with the surgeon's best surgical judgment.

Exclusion criteria

Exclusion Criteria:

  1. Severe corneal scarring that markedly affects vision
  2. Contraindications to any study medications or their components
  3. Pregnancy or breast feeding
  4. Active Herpes Corneal Disease
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
1,324 participants (actual)

Study arms

  • Other
    Theralight crosslinking and Riboflavin

    ultraviolet-A (UVA)-induced cross-linking of corneal collagen (CXL) using UVA light and the photo- mediator riboflavin

    Other: Theralight crosslinking and Riboflavin

Interventions

  • OtherTheralight crosslinking and Riboflavin

    Corneal Collagen cross linking with UV light and riboflavin

06

What researchers measure

Primary outcomes

  1. Change in Best Spectacle Corrected Visual Acuity (BSCVA)

    Time frame: 6-9 months

Secondary outcomes

  1. Change in Uncorrected Visual Acuity (UCVA)

    Time frame: 6-9 months

  2. Change in Corneal topography

    Time frame: 6-9 months

  3. Change in Manifest Refraction

    Time frame: 6-9 months

  4. Change in Keratometry on topography and Pentacam

    Time frame: 6-9 months

  5. Change in Wavefront Refraction and aberrations

    Time frame: 6-9 months

07

Study locations

6 sites
  • Center for Excellence in Eye Care
    Miami, Florida 33176, United States
  • Stulting Research Center at Woolfson Eye Institute
    Atlanta, Georgia 30328, United States
  • TLC Laser Eye Center
    Rockville, Maryland 20852, United States
  • Talamo Hatch Laser Eye Consultants, LLC
    Boston, Massachusetts 02451, United States
  • Cleveland Eye Clinic
    Brecksville, Ohio 44141, United States
  • TLC Laser Eye Center
    Fairfax, Virginia 22031, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 12, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01956474
Lead sponsor
Cxlusa
Responsible party
Sponsor
First posted
Oct 8, 2013
Start date
Jan 2013
Primary completion
Feb 3, 2017
Completion
Feb 3, 2017
Last update
Oct 12, 2018

Study contacts

William Trattler, MD
principal investigator · Cxlusa

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Oct 2018. You cannot join it, but the record below documents what was studied.

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