Comparison of Tear Evaporation Rate With DAILIES TOTAL1 and Biotrue ONEday

Inclusion Criteria: 1. Is at least 17 years of age and has full legal capacity to volunteer; 2. Has read and signed an information consent letter; 3. Is willing and able to follow instructions and maintain the appointment schedule; 4. Has worn soft contact lenses for a minimum of 6 months; 5. Currently wears soft contact lenses for at least 4 days per week and 8 hours per day; 6. Has an acceptable fit and comfort with both study contact lenses in the powers available; 7. Has less than or equal to 1.00DS difference between eyes in their habitual contact lenses; 8. Is willing to be awake for at least 2 hours before visit 2; 9. Is willing to not wear eye makeup on the day of visit 2 and 3; 10. Is willing to not use eye drops or artificial tears on the day of visits 1, 2, and 3; 11. Has a wearable pair of spectacles. Exclusion Criteria: 1. Is participating in any concurrent clinical or research study; 2. Has any known active\* ocular disease and/or infection; 3. Has a systemic condition that in the opinion of the investigator may affect a study outcome variable; 4. Is using any systemic or topical medications that in the opinion of the investigator may affect a study outcome variable; 5. Has known sensitivity to sodium fluorescein dye; 6. Is pregnant, lactating or planning a pregnancy at the time of enrolment (by verbal confirmation at the screening visit); 7. Is aphakic; 8. Has undergone refractive error surgery; 9. Has a known sensitivity to petroleum jelly (Vaseline); 10. Has epilepsy and/or a sensitivity to flashing lights; 11. Wears toric contact lenses; 12. Has any physical impairment that would interfere with holding the evaporimeter; 13. Has taken part in another research study within the last 14 days.