Category Archives: soft contact lens study

The Description for Soft Contact Lenses

EARTH: Seeking lens wearers with ocular allergy symptoms

The purpose of this study is to investigate whether a new contact lens that contains a medication to help with ocular allergies will provide a better quality of life compared to a lens that does not contain medication.

About the study

There will be a total of 4 visits on 4 study days:

  • Visit 1 – Screening, Baseline evaluation + Lens fit – 1.5 hours
  • Visit 2 Dispense Lens Type 1– 1 hour
  • Visit 3 – Follow-up Lens Type 1 + Dispense Lens Type 2 – 1.5 hours
  • Visit 4 – Follow-up Lens Type 2 + Study exit –1 hour

Total time commitment = 5 hours over the course of 4-5 weeks

There are some questionnaires to be completed between study visits, estimated time commitment of 1 hour spread across the study period.

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

Participant requirements

  • Aged 18 and above
  • Wear soft spherical contact lenses
  • Currently experiencing ocular allergy symptoms, including itchy eyes
  • Use allergy medications (oral or eye drops)
  • Can be successfully fitted with two study contact lenses in the powers available (-0.50 to -7.00 D)


In appreciation of your time, you will receive $100 upon study completion. All study products will be supplied. Parking passes will be provided as required.

Further information

If you have questions about this study or would like more information, please call us on 519-888-4742 or email us at and mention study ID: EARTH.

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 contact us using the link below and refer to study ID: EARTH.

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