New contact lens study tests better comfort for astigmatism sufferers
NCT ID NCT06873048
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested two types of soft contact lenses—Myday Sphere and Myday Toric—in 32 people who already wear spherical lenses but have low astigmatism. Participants wore each lens type for one week and rated comfort on a 0-100 scale. The goal was to see if the toric lens offers better comfort for those with mild astigmatism.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- stenfilcon A contact lenses (sphere and toric designs)
- What this could lead to
- If successful, this could show that toric lenses provide better comfort for people with low astigmatism who currently wear spherical lenses.
- What could go wrong
- This is a small, short-term study with only 32 participants, so results may not apply to everyone. Comfort is subjective and measured on a scale.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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32 people
The number who actually took part.
- Started
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Feb 2025
- Finished
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Jul 2025
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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17 to 42 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. At least 17 years and no more than 42 years of age. 2. Have read and signed the study consent form. 3. Are willing and able to follow instructions and maintain the appointment schedule. 4. Are habitual wearer of spherical soft contact lenses (not toric or multifocal design), any brand and any replacement frequency. 5. Are willing to wear the study contact lenses for 6 days a week while in this study and on three days (day 1, Day 7 and Day 13) for at least 12 hours. 6. Are willing to provide a contact email and telephone number and to use a device that allows them to respond to a short online questionnaire every 3 hours on days 1, 7 and 13 of each lens arm, while wearing one of the 2 study lenses. 7. Are non-presbyopic i.e. no requirement for a reading addition for routine daily tasks (self report). 8. Have astigmatism of either -0.50, -0.75, -1.00 or -1.25 DC in each eye by subjective sphero-cylindrical refraction. 9. Achieves at least 0.10 LogMAR in each eye by subjective sphero-cylindrical refraction. 10. Can be fit with available study contact lens powers of between +6.00 to -10.00 DS. 11. Demonstrate an acceptable fit with the study contact lenses. Exclusion Criteria: 1. Are participating in any concurrent clinical interventional study. 2. Have worn rigid contact lenses in the last 3 months. 3. Have worn soft toric contact lenses in the past 3 months. 4. Have any known active ocular disease or allergies and/or infection. 5. Have clinically significant biomicroscopy findings or have an ocular condition that contraindicate contact lens wear. 6. Have a systemic condition that in the opinion of the investigator may affect a study outcome variable or contraindicate wearing soft contact lenses. 7. Are using any systemic or topical medications that in the opinion of the investigator may affect a study outcome variable or contraindicate wearing soft contact lenses. 8. Have known sensitivity to the diagnostic sodium fluorescein to be used in the study. 9. Have undergone refractive error surgery or intraocular surgery. 10. Are an employee of the Centre for Ocular Research \& Education directly involved in this study.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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School of Optometry & Vision Science
Waterloo, Ontario, N2L 3G1, Canada
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