Assessment of Comfort & Ocular Surface Parameters w Novel Designs of Daily Disposable Silicone Hydrogel Contact Lenses

The objectives of the study are

• to identify possible reasons for the different comfort and vision experience in Japanese CL wearers compared to Caucasian CL wearers and
• to assess whether the modification of lens thickness in the optical zone results in increased comfort and reduced visual acuity fluctuations in Caucasian eyes.

Inclusion criteria

• Is at least 18 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;
• Is of Caucasian heritage;
• Habitually wears soft spherical daily disposable contact lenses with a power between

-0.50 to -2.75D (inclusive);

• Demonstrates an acceptable fit with both study CL designs (initial & modified);
• Is correctable to a visual acuity of 0.20 LogMAR (approximately 20/30) or better (in each eye) with both study CL designs;
• Has a manifest cylindrical spectacle refraction that does not exceed -1.00DC in either eye;
• Should own 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 the diagnostic pharmaceuticals to be used in the study;
• Is pregnant, lactating or planning a pregnancy at the time of enrolment (by self-report);
• Is aphakic;
• Has undergone refractive error surgery; -