Study to Evaluate the Safety and Efficacy of Epi-on Corneal Cross-linking in Eyes With Progressive Keratoconus

Phase 3

Completed

• Conditions: Progressive Keratoconus
• Interventions: Drug: Test Article A; Drug: Placebo; Drug: Test Article B; Device: KXL medical device system

• Registration Number: NCT03442751
• Lead Sponsor: Glaukos Corporation

Brief Summary

To evaluate the safety and efficacy of epithelium-on corneal collagen cross-linking (CXL) in impeding the progression of, and/or reducing corneal curvature (Kmax) in eyes with progressive keratoconus. Epithelium-on CXL uses a formulation that allows the riboflavin to penetrate the cornea without the need to remove the epithelium, the outer most layer of the cornea.

Detailed Description

Up to 275 study eyes with progressive keratoconus will be enrolled. Study eyes will be randomized in a 2:1 ratio to receive CXL treatment or sham/control treatment.The primary efficacy endpoint is a difference of ≥ 1 diopter between treatment groups in the mean change in Kmax from baseline to Month 6.

Study Timeline

• Study First Submitted: 2018-02-16
• Study First Submitted QC: 2018-02-16
• Study First Posted: 2018-02-22
• Study Start: 2018-04-06
• Primary Completion: 2019-11-01
• Study Completion: 2020-08-10
• Disposition First Submitted: 2020-12-16
• Results First Submitted: 2023-06-22
• Status Verified: 2024-01
• Results First Submitted QC: 2024-01-29
• Last Update Submitted: 2024-01-29
• Results First Posted: 2024-01-30
• Disposition First Posted: 2024-01-30
• Last Update Posted: 2024-01-30

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 201

Inclusion Criteria

1. Be between 12 and 55 years of age, male or female, of any race;
2. Provide written informed consent and sign a HIPAA form. Subjects who are under the age of 18 (or have not yet reached the age of majority per local regulations) will need to sign an assent form as well as having a parent or legal guardian sign an informed consent
3. Ability to read English or Spanish to complete the NEI-VFQ 25 questionnaire;
4. Willingness and ability to follow all instructions and comply with schedule for follow-up visits;
5. For females capable of becoming pregnant, agree to have urine pregnancy testing performed prior to randomization of each study eye; must not be lactating, and must agree to use a medically acceptable form of birth control for at least one week prior to the randomization visit, and continue to use the method for one month following the treatment. Acceptable forms for birth control are spermicide with barrier, oral contraceptive, injectable or implantable method of contraception, transdermal contraceptive, intrauterine device, or surgical sterilization of partner. For non-sexually active females, abstinence will be considered an acceptable form of birth control. Women considered capable of becoming pregnant include all females who have experienced menarche and have not experienced menopause (as defined by amenorrhea for greater than 12 consecutive months) or have not undergone successful surgical sterilization (e.g. hysterectomy, bilateral tubal ligation, or bilateral oophorectomy);
6. Having topographic and clinical evidence of keratoconus

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Exclusion Criteria

1. Contraindications, sensitivity or known allergy to the use of the test article(s) or their components;
2. If female, be pregnant, nursing or planning a pregnancy or have a positive urine pregnancy test prior to the randomization or treatment of either eye or during the course of the study;
3. Previous ocular condition (other than refractive error) in the eye to be treated that may predispose the eye for future complications.
4. A history of delayed epithelial healing in the eye to be treated or a current condition that may interfere with or prolong epithelial healing;
5. A history of previous corneal cross-linking treatment in the eye to be treated;
6. Have used an investigational drug or device within 30 days of screening or be concurrently enrolled in another investigational drug or device trial within 30 days of the study.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Epithelium-on CXL Treatment Group	Test Article A	Study eye receives Test Article A, Test Article B, and exposed to cross-linking dose of UVA light generated by the KXL medical device system
Epithelium-on CXL Treatment Group	Test Article B	Study eye receives Test Article A, Test Article B, and exposed to cross-linking dose of UVA light generated by the KXL medical device system
Epithelium-on CXL Treatment Group	KXL medical device system	Study eye receives Test Article A, Test Article B, and exposed to cross-linking dose of UVA light generated by the KXL medical device system
Sham Treatment/Control Group	Placebo	Sham eye receives Placebo and and exposed to mock dose of UVA light generated by the KXL medical device system
Sham Treatment/Control Group	KXL medical device system	Sham eye receives Placebo and and exposed to mock dose of UVA light generated by the KXL medical device system

Primary Outcome Measures

Name	Time	Method
Difference Between Treatment Groups in the Change From Baseline to Month 6 in Kmax	6 months	Mean difference of at least 1 diopter in Kmax change from baseline to Month 6 between treatment groups

Secondary Outcome Measures

Name	Time	Method
Difference Between Treatment Groups in the Change From Baseline to Month 12 in Kmax	12 months	Difference between the CXL and Sham/Control treatment groups in the change from baseline to Month 12 in Kmax

Trial Locations

Locations (1)

Ophthalmic Consultants of Boston; 🇺🇸 Waltham, Massachusetts, United States