To Evaluate The Performance Of Two Monthly Replacement Silicone Hydrogel Contact Lenses After 1-month Of Wear

This study will be a prospective, randomized, double-masked, single-site, 1-month cross-over design involving bilateral eye daily wear of two different monthly replacement CL types. Each lens will be worn bilaterally for approximately one month.

Inclusion criteria

• Is at least 17 years of age and has full legal capacity to volunteer;
• Self-reports having had a full eye examination within the previous 2 years;
• Has read and signed an information consent letter;
• Is willing and able to follow instructions and maintain the appointment schedule;
• Is a habitual wearer of frequent replacement contact lenses;
• Anticipates no difficulty wearing the contact lenses for 6 days/week and 8 hours/day during the study;
• Has refractive astigmatism no higher than -0.75DC in each eye;
• Can be successfully fit with both study lens types;
• Achieves at least 0.4 logMAR VA monocularly and at least 0.2 logMAR VA binocularly with each study lens type.

Exclusion criteria

• Is participating in any concurrent clinical research study;
• Has any known active ocular disease and/or infection;
• Has an unstable systemic condition that in the opinion of the investigator may affect vision or contact lens comfort across the 2-month study duration;
• Is using any systemic or topical medications in an irregular routine that in the opinion of the investigator may affect vision or contact lens comfort across the 2-month study duration;
• Has known sensitivity to the diagnostic sodium fluorescein to be used in the study;
• Is an employee of the Centre for Ocular Research & Education.