Comparison of Three Soft Bifocal Contact Lenses
Presbyopia
About this trial
This is an interventional treatment trial for Presbyopia
Eligibility Criteria
Inclusion Criteria:
- The subject must between 35 and 70 years of age.
- The subject must respond positively to at least one symptom on the "Presbyopic Symptoms Questionnaire" or be already wearing presbyopic contact lens correction ( e.g. reading spectacles over contact lenses, multifocal or monovision contact lenses etc.).
- The subject's spherical equivalent distance refraction must be in the range of -1.00 to -6.00 in each eye.
- Refractive cylinder must be less than or equal to -0.75 D in each eye.
- The subject must have an add power of +0.75D to +2.50D in each eye.
- The subject must have best corrected visual acuity of 20/20-3 or better in each eye.
- The subject's must have at least 20/30-distance vision with the study contact lenses.
- The subject must agree that they are comfortable with their vision prior to being dispensed the study lenses.
- The subject must be an adapted soft contact lens wearer in both eyes.
- The subject must appear able and willing to adhere to the instructions set forth in this clinical protocol.
- The subject must read and sign the STATEMENT OF INFORMED CONSENT and be provided a copy of the form.
Exclusion Criteria:
- Ocular or systemic allergies or disease that may interfere with contact lens wear.
- Systemic disease, autoimmune disease or use of medication, which may interfere with contact lens wear.
- Clinically significant (grade 3 or 4) corneal edema, corneal vascularization, corneal staining or any other abnormality of the cornea, which may contraindicate contact lens wear.
- Clinically significant (grade 3 or 4) tarsal abnormalities that might interfere with contact lens wear.
- Any ocular infection.
- Any corneal distortion resulting from previous hard or rigid gas permeable contact lens wear.
- Pregnancy or lactation
- Any infectious disease (e.g., hepatitis, tuberculosis) or a contagious immunosuppressive disease (e.g., HIV).
- History of diabetes. History of binocular vision abnormality or strabismus.
Sites / Locations
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Arm 5
Arm 6
Active Comparator
Active Comparator
Active Comparator
Active Comparator
Active Comparator
Active Comparator
senofilA test/senofilA prod/balafilconA
senofilcon A test/balafilcon A/senofilcon A prod
senofilcon A prod/senofilcon A test/balafilcon A
senofilcon A prod/ balifilcon A/ senofilcon A test
balafilcon A/senofilcon A test/senofilcon A prod
balafilcon A/senofilcon A prod/senofilcon A test
Subjects wear 3 multifocal contact lenses: senofilcon A test worn first, senofilcon A production worn second, and balafilcon A worn third.
Subjects wear 3 multifocal contact lenses: senofilcon A test worn first, balafilcon A worn second, and senofilcon A production worn third.
Subjects wear 3 multifocal contact lenses: senofilcon A production worn first, senofilcon A test worn second, and balafilcon A worn third.
Subjects wear 3 multifocal contact lenses: senofilcon A production worn first, balafilcon A worn second, and senofilcon A test worn third.
Subjects wear 3 multifocal contact lenses: balafilcon A worn first, senofilcon A test worn second, and senofilcon A production worn third.
Subjects wear 3 multifocal contact lenses: balafilcon A worn first, senofilcon A production worn second, senofilcon A test worn third.