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Assessment of the Relationship of Soft Contact Lens Fit and Power (Fit & Lens pOwer Soft lenSes)

Study acronym: FLOSS
StatusEnrolling by Invitation
PhaseNot applicable
Started
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Record status
This record was last updated January 21, 2026 (before its estimated August 31, 2026 completion). Its status may not reflect the trial's current state.

Record History

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  1. Primary completion date: Aug 31, 2025 to Aug 31, 2026v2 Show 6 more changesShow less
    • Start date: Oct 1, 2024 to Jan 30, 2026
    • Study completion date: Aug 31, 2025 to Dec 31, 2026
    • Secondary endpoints: details revised at 1 of 1 entry
    • Primary endpoints revised (3)
    • Study description shortened, about 27 words
    • Collaborator revised
  2. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
The purpose of this study is to evaluate whether altering the optical power (in dioptres) of a contact lens affects both vision and lens fit. As the majority of modern contact lens wearers prefer daily disposable soft lenses, the trial lenses used in this study-provided by CooperVision-reflect this trend, representing nearly 80% of the current UK market. This study aims to generate data supporting the use of contact lenses with powers that do not precisely match a participant's visual prescription (within ±2.00 dioptres) as a viable temporary alternative when the exact required power is unavailable. At present, there is no published literature in the context of modern contact lens design that compares the fitting characteristics of 'fit-for-purpose' lenses with those of lenses from the same design family that would not typically be selected due to power mismatch.
Trial Details
NCT Number NCT06745375
Lead Sponsor Aston University
Collaborators: CooperVision, Inc.
Conditions
(from sponsor)		 Healthy Participants Study, Contact Lens Wear, Contact Lens Fit
Enrollment 38 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov