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

Enrolling by invitation · Not applicable

Conditions studied: Healthy Participants Study, Contact Lens Wear, Contact Lens Fit

In brief

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.

Key facts

Study ID

NCT06745375

Run by

Aston University

People needed

38

Starts

2026-01-30

Expected to finish

2026-12-31

Last updated by the study team

2026-01-21

Who can join

Age: 18 and older, up to 60. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Between 18-60 years of age
• Vision correctable to at least 6/12 (20/40) or better in each eye
• with mental capacity to provide written consent in English (as per the Mental Capacity Act, 2005).
• happy to wear investigational contact lenses

You may not qualify if…

• Any active infection or inflammation, history of major systemic or ophthalmic conditions
• use of systemic or topical medications known to affect the eye in the previous 3 months
• history of ocular surgery, currently enrolled on another study/clinical trial that may impact outcome
• any other contraindications for typical contact lens wear
• As per the Mental Capacity Act, 2005, participants will be automatically excluded if not deemed to have Capacity for consent or under the age of 18.

Where it is running

• School of Optometry, Aston Eye Clinic — Birmingham, UK, United Kingdom

Full record on ClinicalTrials.gov

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