All posts by Barbara McKechnie

PANDA: Seeking soft lens wearers to compare the performance of 2 soft contact lenses

Most contact lenses need to be inserted at the beginning of the wear day and taken out at night. We are comparing the handling of two contact lenses that are made of different materials. One of the lenses is commercially available in Canada, the other one is not commercially available in Canada and is therefore considered an investigational lens.

Time Commitment

You will be asked to attend 1 study visit, which will last approximately 4 hours, and will include the following segments:

  • V1 .1: Eligibility screening (60 mins). If eligible, continue to V1.2:
  • V1.2: Lens 1 wear period & assessment (75 mins)
  • V1.3: Lens 2 wear period & assessment (90 mins)
  • V1.4: Final tests &study exit (15 mins)

Total time commitment = 4 hours

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

Why You Should Participate

  • Participants many not benefit directly from this study. Information from this study may help our researchers and the study sponsor to better understand the differences between study lenses, lens performance, user preference, and may help improve contact lenses in the future.
  • Our past research has helped develop many of the contact lenses and related products relied upon by consumers around the world. Participation in our research will feed directly into new or improved product development in eye and vision care and contribute to our understanding of eye health.

Participant Requirements

  • Astigmatism/CYL  ≤-0.75DC
  • Aged 17 to 40 years inclusive, with full legal capacity to volunteer
  • Astigmatism/CYL  ≤-0.75DC
  • Wears spherical soft contact lenses habitually (daily wear)
  • Can be fit with study lenses with a power between -1.00 and -6.00DS
  • Is able to refrain from using contact lenses &/or tear drops on the day of study visit


  • Current active ocular allergies; eye surgeries of any type
  • Has worn hard contact lenses in the past 6 months
  • Wears contact lenses that correct for astigmatism or near vision
  • Has a history of the eyes not working well together or has a lazy eye
  • Can be fit with study lenses with a power between -1.00 and -6.00DS

What are investigational lenses?

Investigational lenses are lenses that are not commercially available/sold in Canada. The investigational lenses that will be used in this study are very similar to a lens currently sold in Canada and are available in the United Kingdom. Health Canada has authorized use of this lens for the PANDA study.


In appreciation of your time, you will receive $80 upon study completion. All study products will be provided. Parking tokens will be provided as required.

More Information

If you have questions or would like more information about this study, please phone 519-888-4742 or email and refer to Study ID: PANDA. You will be provided with all relevant study information prior to study enrollment, and you are under no obligation to participate.

Please let us know if you require any specific accommodations to make your visit as easy as possible for you.

How to Participate

To be eligible for any research studies at CORE, potential participants must have an active participant (volunteer) profile registered in our volunteer database.

Create a Participant Profile 

Register a profile in our volunteer database. We will contact you with more information after reviewing your information. When creating your profile, you will be asked to provide your contact information and complete a short series of questions about your eyes. All information collected is confidential.

I am already registered with CORE and would like to participate

If you fit the requirements and are interested in participating, please email and refer to Study ID: PANDA.  We will review your profile and get back to you with more info, including how to book a study appointment.

All studies conducted at CORE have been reviewed and received ethics clearance through a University of Waterloo Research Ethics Board.