Category Archives: current contact lens wearers

New contact lens study (Study ID: BASSET)

What are we trying to learn?

Despite improvements in contact lens materials, many contact lens wearers commonly report symptoms such as discomfort by the end of the day. It has been suggested that daily disposable lenses could have benefits over frequent replacement (bi-weekly or monthly) lenses.  

The objective of this study is to evaluate and compare the performance of two daily disposable contact lenses in people who habitually use soft contact lenses.  

About the study

This study will be conducted over approximately 2 weeks. The study visits are:

Visit #1 & 2 (normally both visits are combined) – Screening visit to determine eligibility (1.25 hrs) anddispensing of study lenses (0.75 hrs) – 2 hours total

Visit #3 & 4 – (normally both visits are combined) – 1-week follow-up visit (0.75 hr) and dispensing of study lenses (0.75 hr) –  (1.5 hours total)

Visit #5 – 1-week follow-up visit and study exit. – (1 hour)

Total time commitment5.5 hours (time includes 4.5 hours for study visits plus 1 additional hour for at-home tasks)

The visits will include standard clinical procedures that you might encounter when you attend an eye exam.

What are the requirements?

  • You are at least 17 years of age.
  • You habitually wear contact lenses at least 8 hours/day, 5 days per week.
  • You anticipate no difficulty in wearing soft contact lenses for 12 hours/day.
  • You can be fit with the two study contact lenses in the powers available (-0.50 to -10.00 D).
  • You have not previously worn clariti 1 day or Precision 1 lenses.

Reimbursement

In appreciation of your time, you will receive $20 per hour for attending study visits (4.5 hours) and for the additional hour for at-home tasks, for a total of $110 upon study completion. All study products are supplied at no cost. If you drive to your appointments, parking tokens will be provided.

How to participate

If you are interested in participating, please create a volunteer profile at the link below and we will contact you with more information. If you are already a registered CORE volunteer, please email corestudies@uwaterloo.ca and mention the study name BASSET. You will be provided with all relevant study information prior to study enrollment and you are under no obligation to participate. 

New contact lens study (Study ID: PUG)

What are we trying to learn?

There is evidence that contact lens wearers experience higher prevalence of symptoms of eye strain, eye fatigue or blurred vision compared to non-lens wearers when using digital devices. The purpose of this study is evaluate the performance of a new daily disposable contact lens in individuals who use digital devices for at least 6 hours per day.

About the study

If eligible, you will be asked to follow the study instructions and attend the following visits.

  • Visit 1 – Screening to determine eligibility– 1 hour
  • Visit 2 – Baseline measurement & product dispense – 0.5 hours
    *Visit 1 & 2 are completed on the same day, back-to-back.
  • Visit 3  – 2-week-follow-up visit & study exit – 1 hour

You will also be asked to complete at-home questionnaires between visits – 0.5 hours

Total time commitment3 hours

The visits will include standard clinical procedures that you might encounter when you attend an eye exam.

What are the requirements?

  • You are between 18 and 40 years of age
  • You currently wear contact lenses at least 5 days/week, 10hrs/day
  • You use digital devices at least 6 hours/day

Reimbursement

In appreciation of your time you will receive up to $60. Parking passes will be provided as required.

How to participate

If you are interested in participating, please create a volunteer profile at the link below and we will contact you with more information. If you are already a registered CORE volunteer, please email corestudies@uwaterloo.ca and mention the study name PUG. You will be provided with all relevant study information prior to study enrollment and you are under no obligation to participate. 

New contact lens study (Study ID: CORGI)

What are we trying to learn?

The purpose of this study is to refit wearers of daily disposable contact lenses who currently experience symptoms of dry eye and discomfort during lens wear, with a different type of daily disposable contact lens.

We will evaluate the performance of your habitual lenses and the study lenses by taking measurements and asking you questions about your lens wearing experience.

About the study

If eligible, you will be asked to follow the study instructions and attend the following visits:

  • Visit 1 – Screening to determine eligibility– 1.5 hour
  • 1 week of habitual lens wear
  • Visit 2 – Baseline measurement & study lens dispense – 1 hour
  • 1 month of study lens wear
  • Visit 3 –1-month-follow-up visit & study exist – 1 hour


Total time commitment4.5 hours (3.5 hours of study visits plus 1 additional hour for at-home ratings)

The visits will include standard clinical procedures that you might encounter when you attend an eye exam.

What are the requirements?

  • You are at least 17 years of age
  • You are currently wearing daily disposable contact lenses at least 1 day a week and experience symptoms of dryness or discomfort
  • You are willing to wear daily disposable contact lenses at least 3 days a week for the duration of the study.
  • You are willing and able to follow instructions and maintain the appointment schedule

Reimbursement

In appreciation of your time you will receive up to $90. Parking passes will be provided as required.

How to participate

If you are interested in participating, please email corestudies@uwaterloo.ca with the subject line: CORGI.  You will be provided with all relevant study information prior to study enrolment and you are under no obligation to participate.