Evaluating Two Multifocal Daily Disposable Contact Lenses

This prospective, bilateral eye, open label, non-randomized study compared the performance of 2 different designs of daily disposable multifocal contact lenses.

Inclusion criteria

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

• Was at least 42 years of age and had full legal capacity to volunteer;
• Had read and signed an information consent letter;
• Self-reported having had a full eye examination in the previous two years;
• Anticipated being able to wear the study lenses for at least 8 hours a day, 5 days a week;
• Was willing and able to follow instructions and maintain the appointment schedule;
• Habitually wore multifocal soft contact lenses, for the past 3 months minimum (NOTE: the habitual contact lens type was restricted such that no more than one third were to be the clariti 1 day multifocal and no more than one third were to be MyDay multifocal (this included their equivalent private label brand name);
• Had refractive astigmatism no higher than -0.75DC in each eye;
• Was presbyopic and required a reading addition of at least +0.75D and no more than +2.50D in each eye;
• Could be fit and achieved binocular distance vision of at least 20/30 Snellen (or +0.20 logMAR) which participants also deemed to be 'acceptable', with the available study lens parameters (powers +4.00 to -6.00DS)

Exclusion criteria

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

• Was participating in any concurrent clinical or research study;
• Had any known active ocular disease and/or infection that contraindicated contact lens wear;
• Had a systemic condition that in the opinion of the investigator may have affected a study outcome variable;
• Was using any systemic or topical medications that in the opinion of the investigator may have affected contact lens wear or a study outcome variable;
• Had known sensitivity to the diagnostic sodium fluorescein to be used in the study;
• Self-reported as pregnant, lactating or planning a pregnancy at the time of enrolment;
• Had undergone refractive error surgery or interocular surgery.