Quantifying Ocular Surface Aberrations After Tear Film Interventions

Inclusion criteria

• Are at least 17 years of age and have full legal capacity to volunteer.
• Have signed the information consent letter.
• Are willing and able to follow instructions and maintain the appointment schedule.
• Habitually wear spherical soft contact lenses (no multifocal lens, no toric lens wear or extended (overnight) wear).
• Have a vertex-corrected refractive astigmatism of no more than 0.75D in each eye.
• Achieve a best corrected visual acuity of 0.00 logMAR or better in each eye.
• Agree to wear the study contact lenses for at least 6 hours.
• Have clear corneas (e.g. no central scars).
• Have no active ocular disease or inflammation.

Exclusion criteria

• Are participating in another concurrent clinical research study.
• Have worn any rigid contact lenses in the past 30 days.
• Have been diagnosed with irregular cornea (e.g., keratoconus, etc.).
• Have any known active ocular condition, disease, and/or infection.*
• Have a systemic or ocular condition that, in the opinion of the investigator, may affect a study outcome variable.
• Have a known sensitivity to the diagnostic sodium fluorescein to be used in the study.
• Have undergone refractive error surgery.
• Are a member of the study team for this study, i.e. are listed on the delegation log for this study.