Performance of a Multifocal Contact Lens - Presbyopia Study

Inclusion criteria

• Healthy adult males or females age 40 to 70 and has full legal capacity to volunteer.
• The subject is a current spherical silicone hydrogel multifocal (SiHy) contact lens wearer (defined as a minimum of 2 days per week for at least 6 hours of Daily Wear contact lenses, for a minimum of one month prior to the study) and willing to wear the study lenses on a daily basis (defined as a minimum of 6 hours of wear per day) for the duration of the study.
• The subject must own a pair of wearable spectacles to wear when they cannot wear the study lenses.
• The subject's optimal vertexed spherical equivalent distance correction must be between +3.50 and -5.50 Diopters (D) (inclusive) in both eyes.
• Subjective refraction cylinder power must be less than or equal to 0.75 D in both eyes.
• Requires a reading addition of +0.75 D to +2.50 D in each eye.
• The subject must have distance and near visual acuity best correctable to logMAR 0.1 (20/25) or better at both distance and near with subjective refraction for each eye.
• The subject must read and sign the Informed Consent form.
• The subject must appear able and willing to adhere the instructions set forth in this clinical protocol.

Exclusion criteria

• Has a systemic condition that in the opinion of the investigator may affect a study outcome variable;
• Participant in unrelated research clinical trial within 30 days prior to enrollment;
• Known to have any infectious disease (e.g.hepatitis, tuberculosis) or a contagious immunosuppressive disease.
• Women who are pregnant or lactating or planning a pregnancy at the time of enrollment;
• Ocular or systemic allergies or disease which might interfere with contact lens wear;
• Have any systemic disease, autoimmune disease, or use of medication, which may interfere with contact lens wear. This may include, but not be limited to, hyperthyroidism, recurrent herpes simplex/zoster, Sjogren's syndromes, xerophthalmia, acne rosacea, Stevens-Johnson syndromes.
• Systemic disease or use of medication which might interfere with contact lens wear;
• Any corneal distortion;
• Has any known active* ocular disease and/or infection;
• Is using any systemic or topical medications that in the opinion of the investigator may affect a study outcome variable; and only uses rewetting drops on an occasional basis( greater than 2 times per week).
• Is a habitual monovision contact lens wearer wearing contact lenses on extended wear basis or for the past 6 months;
• Diagnosed with Diabetes;
• Is aphakic; or Has entropion, ectropion, chalazia, recurrent styes, glaucoma, history of recurrent corneal erosions.
• Has undergone refractive error surgery;
• Has amblyopia or strabismus;
• Has anisometropia >2 D between both eyes;
• Has a known sensitivity to the diagnostic pharmaceuticals to be used in the study;
• Any grade 3.0 or greater slit lamp findings (e.g., edema, corneal neovascularization, corneal staining, tarsal abnormalities, conjunctival injection) on the Efron classification scale, any previous history or signs of a contact lens-related corneal inflammatory event (e.g., past peripheral ulcer or round peripheral scar), or any other ocular abnormality that may contraindicate contact lens wear;
• Employee of investigational clinic (e.g., Investigator, Coordinator, Technician)