Randomized, double-masked, 5-visit, bilateral dispensing, parallel group study to demonstrate that the investigational contact lens meets the design requirements related to corneal staining, lens fit, visual acuity and rotational performance as well as subjective comfort and handling. Subjects will wear the contact lenses for a total of 28-36 days.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
267
Senofilcon C Toric
Air Optix for Astigmatism
Golden Optometric Group
Whittier, California, United States
Dr. James Weber & Associates, PA
Jacksonville, Florida, United States
Monocular Distance Visual Acuity (VA)
Monocular distance visual acuity was measured with the study lens using a Snellen distance VA chart at an optical distance of 20 feet throughout the study. Observed VA data collected during all planned visits were dichotomized whether VA was "20/40 or better (acceptable VA)" or "worse than 20/40 (unacceptable VA)". VA of 20/40 with a negative modifier was considered worse than 20/40. The number of eye with acceptable VA was reported for each study lens.
Time frame: Up to 4-Week Follow-up
Lens Fit Acceptance
Lens fit characteristics were assessed using slit lamp with respect to lens position, movement and tightness. Each lens fit collected at fitting (visit 1) was judged being either acceptable or unacceptable based on the static and dynamic fit characteristic. The number of eyes with acceptable lens fit was reported for each study lens.
Time frame: 15 Minutes Post Lens Fitting
Lens Stability With Blink
Lens rotational stability with blink was assessed using slit lamp with beam that can be rotated. The stability of the scribe mark rotational position during a series of normal (unforced) blinks was assessed, and then dichotomized whether stability was less than or equal to 5-degree (acceptable stability) or greater (unacceptable stability). The number of eye with acceptable stability was reported for each lens.
Time frame: 15 Minutes Post Lens Fitting
Absolute Lens Rotation
Lens rotation was assessed using slit lamp with beam that can be rotated. The rotational error (assume shortest distance) and direction (base toward the nose or temple) were calculated, and then absolute rotation was dichotomized whether absolute rotation was less than or equal to 10-degree (acceptable rotation) or greater (unacceptable rotation). The number of eyes with acceptable lens rotation for each lens was reported.
Time frame: 15-minutes Post Lens Insertion
Corneal Staining
Contact lens related corneal staining was assessed using slit lamp throughout the study. Corneal staining was graded using a 5-level scale: 0=no staining, 1=trace, 2=mild, 3=moderate and 4=severe. Corneal staining data collected during planned and unplanned visits were dichotomized whether the level of corneal stating was grade 3 or higher (unacceptable CS) or less than grade 3 (acceptable CS). The number of eyes with Grade 3 or higher was reported for each lens type.
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Edward S. Wygonik, OD
Jacksonville Beach, Florida, United States
Sabal Eye Care
Longwood, Florida, United States
Maitland Vision Center
Maitland, Florida, United States
Indiana University School of Optometry
Bloomington, Indiana, United States
Kannarr Eye Care
Pittsburg, Kansas, United States
ABQ Eye Care
Albuquerque, New Mexico, United States
Sacco Eye Group
Vestal, New York, United States
ProCare Vision Centers
Granville, Ohio, United States
...and 7 more locations
Time frame: Up to 4-Week Follow-up
Overall Comfort
Overall comfort was assessed using the Contact Lens User Experience™ (CLUE) questionnaire. CLUE is a validated patient-reported outcomes (PRO) questionnaire to assess patient-experience attributes of soft contact lenses (comfort, vision, handling, and packaging) in a contact-lens wearing population in the US, ages 18-65. Derived CLUE scores using Item Response Theory (IRT) follow a normal distribution with a population average score of 60 (SD 20), where higher scores indicate a more favorable/positive response with a range of 0-120.
Time frame: Up to 4- Week Follow-up
Overall Handling
Overall Handling was assessed using the Contact Lens User Experience™ (CLUE) questionnaire. CLUE is a validated patient-reported outcomes (PRO) questionnaire to assess patient-experience attributes of soft contact lenses (comfort, vision, handling, and packaging) in a contact-lens wearing population in the US, ages 18-65. Derived CLUE scores using Item Response Theory (IRT) follow a normal distribution with a population average score of 60 (SD 20), where higher scores indicate a more favorable/positive response with a range of 0-120.
Time frame: Up to 4- Week Follow-up
Monocular Distance Visual Acuity (VA)
Monocular distance visual acuity was measured with the study lens using a Snellen distance VA chart at an optical distance of 20 feet. Observed VA data collected at fitting were dichotomized whether VA was "20/20 or better (optimal VA)" or "worse than 20/20". VA of 20/20 with a negative modifier was considered worse than 20/20. The number of eyes with 20/20 vision was reported for each study lens.
Time frame: 15 Minutes Post Lens Fitting