New study for hydrogel or silicone hydrogel contact lens wearers (study ID: Bagpipes)

What are we trying to learn?

Sleeping or napping in contact lenses limits the amount of oxygen reaching the eyes, making the cornea (front of the eye) swell more than it would during waking hours.
In this study, we want to simulate sleeping in contact lenses by placing an eye patch over an eye wearing a contact lens during waking hours to measure the amount of swelling that occurs.

About the study

If eligible, you will be asked to follow the study instructions and attend one of the following schedules depending on which group you are randomly assigned to:
Group A & B:
Visit 1 (DAY 1) – Screening and study measurements– 2.75 hours

Visit 2 (DAY 2) – Baseline assessment and lens dispense– 1.25 hours

*3 hour wait time between Visit 2 &3 with eye patch covering one eye*

Visit 3– Lens removal after 3 hr wait time and measurement taken (same day)
Visit 4– Measurement taken after 0.5 hr from removal (same day)
Visit 5– Measurement taken after 1 hr from removal (same day)
Visit 6– Measurement taken after 2 hr from removal (same day)
Visit 7– Measurement taken after 3 hr from removal then study exit (same day)

*Visits 3-7 will take 4.5 hours

Total time commitment– 11.5 hours over 7 visits.
The visits will include standard clinical procedures that you might encounter when you attend an eye exam.

What are the requirements?

To be eligible for this study, you must meet the following criteria:
• Must be between 17-60 years of age
• Have proof of eye examination within the last 2 years
• Prescription between +4.00 and -8.00
• No previous history of overnight contact lens wear
• GROUP A & B: Have worn the same type of hydrogel or silicone hydrogel daily disposable contact lenses for 3 consecutive years

To learn more or register

Send us an email to or call 519-888-4742 and we’ll be happy to help you register and answer any questions.


Time Commitment

Start Date

End Date

$230 11.5 hours July 2018 ongoing