Clinical Evaluation of Hydrogel and Silicone Hydrogel Daily Disposable Toric Contact Lenses

This was a participant masked, interventional, prospective, direct refit, bilateral wear study. The purpose of this study was to evaluate the patient subjective experiences of a hydrogel daily disposable toric contact lens when compared to a silicone hydrogel daily disposable toric contact lens after 15 minutes of daily wear each.

Inclusion criteria

A person was eligible for inclusion in the study if he/she:

• Is at least 18 years of age and has full legal capacity to volunteer.
• Has read and signed an information consent letter.
• Self-reports having a full eye examination in the previous two years.
• Anticipates being able to wear the study lenses for at least 8 hours a day, 5 days a week.
• Is willing and able to follow instructions and maintain the appointment schedule.
• Habitual soft contact lens wearers who currently wear toric contact lenses, or use spectacles for all distances vision correction, for the past 3 months minimum.
• Has a contact lens spherical prescription between plano to - 10.00 (inclusive) best corrected visual acuity of 20/30 or better in either eye.
• Has refractive astigmatism no less than -0.75D and no more than 1.75D in both eyes.
• Can achieve best corrected spectacle distance visual acuity of 20/25 (0.10 logMAR) or better in each eye.
• Can achieve a distance visual acuity of 20/30 (0.18 logMAR) or better in each eye with the study contact lenses.
• Has clear corneas and no active ocular disease.
• Has read, understood, and signed the information consent letter.

Exclusion criteria

A person was excluded from the study if he/she:

• Is participating in any concurrent clinical or research study.
• Has any known active ocular disease and/or infection that contraindicates contact lens wear.
• 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 contact lens wear or a study outcome variable.
• Has known sensitivity to the diagnostic sodium fluorescein used in the study.
• Self-reports as pregnant, lactating or planning a pregnancy at the time of enrolment.
• Has undergone refractive error surgery or intraocular surgery.