Actively Recruiting

Phase Not Applicable
Age: 18Years - 25Years
All Genders
NCT07155551

Measuring Changes In Choroidal Thickness Induced By Prototype Soft Contact Lenses Worn For 1 Hour

Led by Myoptechs, Inc · Updated on 2025-09-04

20

Participants Needed

1

Research Sites

14 weeks

Total Duration

On this page

Sponsors

M

Myoptechs, Inc

Lead Sponsor

U

University of Waterloo School of Optometry and Vision Science

Collaborating Sponsor

AI-Summary

What this Trial Is About

The objective of the study is to evaluate the short-term change in choroidal thickness induced by 3 prototype soft contact lenses for people with myopia.

CONDITIONS

Official Title

Measuring Changes In Choroidal Thickness Induced By Prototype Soft Contact Lenses Worn For 1 Hour

Who Can Participate

Age: 18Years - 25Years
All Genders

Eligibility Criteria

Eligible

You may qualify if you...

  • Are 18-25 years of age (inclusive) and have full legal capacity to volunteer
  • Have read (or be read to) and signed the information and consent form
  • Habitually wear soft contact lenses or are spectacle wearers with previous experience of soft contact lens wear
  • Are myopic with both eyes having a vertex corrected spherical equivalent non-cycloplegic refraction of at least -0.50 DS and no more than -4.50 DS
  • Achieve at least LogMAR +0.10 with spherical equivalent refraction in each eye
  • Are willing and able to maintain the appointment schedule and follow measurement visit instructions including no caffeine, alcohol, or other stimulants 12 hours before visits and no smoking or recreational cannabis 24 hours before visits
  • Have not used a myopia control treatment within 2 years prior to Visit 0 (including multifocal spectacle or contact lens wear, orthokeratology, or atropine)
  • Typically sleep at least 7 hours per night
Not Eligible

You will not qualify if you...

  • Participating in any concurrent clinical or research study
  • Have astigmatism of more than 1.00 DC in either eye as per non-cycloplegic refraction
  • Have amblyopia in either eye or known binocular vision disorder such as accommodative insufficiency
  • Have any known active ocular disease and/or infection
  • Have a systemic condition that may affect study outcomes, such as diabetes mellitus, hyperthyroidism, or active allergies
  • Are using systemic or topical medications that may affect study outcomes, such as antihistamines or atropine eye drops
  • Have known sensitivity to sodium fluorescein diagnostic pharmaceutical used in the study
  • Are pregnant, lactating, or planning a pregnancy at enrollment
  • Have undergone strabismus surgery, refractive error surgery, or intraocular surgery
  • Are an employee of the Centre for Ocular Research & Education involved in this study

AI-Screening

AI-Powered Screening

Complete this quick 3-step screening to check your eligibility

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Trial Site Locations

Total: 1 location

1

Centre for Ocular Research and Education at the School of Optometry and Vision Science at Waterloo University

Waterloo, Ontario, Canada, N2L 3G1

Actively Recruiting

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How is the study designed?

Study Type

INTERVENTIONAL

Masking

DOUBLE

Allocation

RANDOMIZED

Model

SINGLE_GROUP

Primary Purpose

OTHER

Number of Arms

3

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