1 Week Crossover Dispensing Study Between Two Soft Contact Lenses

Not Applicable

Completed

• Conditions: Myopia
• Interventions: Device: Test Lenses; Device: Control Lenses

• Registration Number: NCT06170658
• Lead Sponsor: CooperVision International Limited (CVIL)

Brief Summary

The objective of this investigation is to compare the visual clinical performance of a silicone hydrogel daily disposable investigational contact lenses to a hydrogel daily disposable commercially available contact lenses.

Detailed Description

This is a prospective, bilateral, double masked (participant and investigator), randomized, cross-over dispensing study with 1 week wearing period in each arm by comparing visual acuity and subjective vision quality.

Study Timeline

• Study First Submitted: 2023-12-06
• Study First Submitted QC: 2023-12-06
• Study Start: 2023-12-11
• Study First Posted: 2023-12-14
• Primary Completion: 2024-08-21
• Study Completion: 2024-08-21
• Status Verified: 2025-02
• Last Update Submitted: 2025-02-13
• Last Update Posted: 2025-02-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

1. Are 8 to 18 years of age inclusive and have full legal capacity to volunteer;
2. Have read and signed and dated the Parental Permission Form (for those aged 16 and younger); participant has read, signed and dated the study Information Consent Letter (if aged 17 or 18 years) or Assent (aged 16 and younger);
3. Are willing and able to follow instructions and maintain the appointment schedule;
4. Are habitual daily wearers of spherical single vision soft contact lenses to correct for distance vision in each eye;
5. Currently wears spherical soft contact lenses or myopia control soft lenses;
6. Have a pair of wearable back-up spectacles;
7. Are willing and able to wear contact lenses for at least 10 hours a day, 6 days a week while in the study;
8. Are myopic with subjective refraction: -0.75D to -7.00D spherical, with an astigmatism ≤ -0.75D in each eye with maximum spherical equivalent anisometropia of 1.00D
9. Are correctable to a visual acuity of +0.10 logMAR or better (in each eye) with sphero-cylindrical subjective refraction;
10. Have clear corneas with no corneal scars or any active ocular disease;
11. Can be fit with the study contact lenses with a power between -0.75 and -7.00 DS; this translates to best corrected vision sphere refraction that vertexes to a CL power between -0.75 and -7.00 (inclusive) at screening visit.
12. Demonstrate an acceptable fit with the study lenses.
13. Demonstrate that they can safely and independently insert and remove contact lenses at the screening/fitting visit;

Exclusion Criteria

1. Have taken part in another clinical research study within the last 14 days;
2. Are currently habitual wearers of toric lenses.
3. Have worn any rigid contact lenses or ortho-keratology lenses in the past 30 days
4. Are an extended lens wearer (i.e., sleeping with their lenses)
5. Are on ongoing atropine treatment for myopia control
6. Have a difference of > 1.0 D in best vision sphere subjective refraction between eyes;
7. Have amblyopia and/or strabismus/binocular vision problem
8. Have any known active ocular disease, allergies and/or infection;
9. Have a systemic condition that in the opinion of the investigator may affect a study outcome variable;
10. Are using any systemic or topical medications that in the opinion of the investigator may affect a study outcome variable;
11. Have a known sensitivity to the diagnostic pharmaceuticals to be used in the study;
12. Have undergone refractive error surgery or intraocular surgery;
13. Are a member of CORE directly involved in the study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Control Lenses, Then Test Lenses	Control Lenses	Participants will wear the Control Lenses in both eyes for one week and then cross over to the Test Lenses in both eyes for one week.
Test Lenses, Then Control Lenses	Test Lenses	Participants will wear the Test Lenses in both eyes for one week and then cross over to the Control Lenses in both eyes for one week.
Test Lenses, Then Control Lenses	Control Lenses	Participants will wear the Test Lenses in both eyes for one week and then cross over to the Control Lenses in both eyes for one week.
Control Lenses, Then Test Lenses	Test Lenses	Participants will wear the Control Lenses in both eyes for one week and then cross over to the Test Lenses in both eyes for one week.

Primary Outcome Measures

Name	Time	Method
High contrast, binocular, distance visual acuity	7 days	Distance visual acuity (LogMAR) will be measured using high and low contrast computer-generated acuity charts.

Secondary Outcome Measures

Name	Time	Method
Subjective Vision Quality	7 days	Subjective vision quality on 0-100 scale, integer steps (0 = Very poor; 100 = Excellent vision, totally sharp)

Trial Locations

Locations (1)

University of Waterloo; 🇨🇦 Waterloo, Ontario, Canada