Comparison of Tear Evaporation Rate With DAILIES TOTAL1 and Biotrue ONEday

Inclusion criteria

• Is at least 17 years of age and has full legal capacity to volunteer;
• Has read and signed an information consent letter;
• Is willing and able to follow instructions and maintain the appointment schedule;
• Has worn soft contact lenses for a minimum of 6 months;
• Currently wears soft contact lenses for at least 4 days per week and 8 hours per day;
• Has an acceptable fit and comfort with both study contact lenses in the powers available;
• Has less than or equal to 1.00DS difference between eyes in their habitual contact lenses;
• Is willing to be awake for at least 2 hours before visit 2;
• Is willing to not wear eye makeup on the day of visit 2 and 3;
• Is willing to not use eye drops or artificial tears on the day of visits 1, 2, and 3;
• Has a wearable pair of spectacles.

Exclusion criteria

• Is participating in any concurrent clinical or research study;
• Has any known active* ocular disease and/or infection;
• Has a systemic condition that in the opinion of the investigator may affect a study outcome variable;
• Is using any systemic or topical medications that in the opinion of the investigator may affect a study outcome variable;
• Has known sensitivity to sodium fluorescein dye;
• Is pregnant, lactating or planning a pregnancy at the time of enrolment (by verbal confirmation at the screening visit);
• Is aphakic;
• Has undergone refractive error surgery;
• Has a known sensitivity to petroleum jelly (Vaseline);
• Has epilepsy and/or a sensitivity to flashing lights;
• Wears toric contact lenses;
• Has any physical impairment that would interfere with holding the evaporimeter;
• Has taken part in another research study within the last 14 days.