Pilot Evaluation of a New Galyfilcon A Contact Lens Compared to a Marketed Galyfilcon A Contact Lens

Not Applicable

Completed

Interventions: Device: galyfilcon A prototype lens
Device: marketed galyfilcon A lens

Brief Summary: The purpose of this study is to compare lens surface characteristics and comfort between an experimental contact lens and a marketed contact lens.

Recruitment & Eligibility

Inclusion Criteria

The subject must be at least 18 years of age and no more than 39 years of age.
The subject is a current spherical soft contact lens wearer (defined as a minimum of 6 hours of daily wear (DW) for a minimum of 1 month prior to the study) and willing to wear the study lenses on a daily wear basis (defined as a minimum of 6 hours of wear per day at least five days of the week) for the duration of the study.
The subject's optimal vertexed spherical equivalent distance correction must be between -1.00 and - 9.00D.
Any cylinder power must be ≤ -0.75D.
The subject must have visual acuity best correctable to 20/25+3 or better for each eye.
The subject must read and sign the Statement of Informed Consent.
The subject must appear able and willing to adhere to the instructions set forth in this clinical protocol.

Exclusion Criteria

Ocular or systemic allergies or disease which might interfere with contact lens wear.
Systemic disease or use of medication which might interfere with contact lens wear.
Clinically significant (grade 3 or 4) corneal edema, corneal vascularization, corneal staining, or any other abnormalities of the cornea which would contraindicate contact lens wear.
Clinically significant (grade 3 or 4) tarsal abnormalities or bulbar injection which 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.
Diabetes.
Infectious diseases (e.g. hepatitis, tuberculosis) or an immuno-suppressive disease (e.g. HIV).
Habitual contact lens type is toric, multifocal, or is worn as extended wear.

Arm && Interventions

Group	Intervention	Description
galyfilcon A prototype/marketed galyfilcon A	galyfilcon A prototype lens	The galyfilcon A prototype lens worn daily for 12-16 days during the first period then the marketed galyfilcon A lens worn daily for 12-16 days during the second period.
galyfilcon A prototype/marketed galyfilcon A	marketed galyfilcon A lens	The galyfilcon A prototype lens worn daily for 12-16 days during the first period then the marketed galyfilcon A lens worn daily for 12-16 days during the second period.
marketed galyfilcon A/galyfilcon A prototype	galyfilcon A prototype lens	The marketed galyfilcon A lens worn daily for 12-16 days during the first period then the galyfilcon A prototype lens worn daily for 12-16 days during the second period; during each period.
marketed galyfilcon A/galyfilcon A prototype	marketed galyfilcon A lens	The marketed galyfilcon A lens worn daily for 12-16 days during the first period then the galyfilcon A prototype lens worn daily for 12-16 days during the second period; during each period.

Primary Outcome Measures

Name	Time	Method
Lens Front Surface Deposits at Day 7	Evaluated at Day 7	Deposits on the front surface of each lens were examined by the investigator after 7 days of lens wear, and graded on a 5-point scale; 0 = no deposit, 1 = 1%-5% deposits, 2 = 6%-15% deposits, 3 = 16%-25% deposits, and 4 = 25% or more deposits. The grades were categorized into binary variable: grade 0 or 1 Vs. grade 2 or higher.
Lens Front Surface Deposits at Day 14	Evaluated at Day 14	Deposits on the front surface of each lens were examined by the investigator after 14 days of lens wear, and graded on a 5-point scale; 0 = 0% deposits, 1 = 1%-5% deposits, 2 = 6%-15% deposits, 3=16%-25% deposits, and 4= 25% or more deposits. The grades were categorized into binary variable: grade 0 or 1 vs. grade 2 or higher.

Secondary Outcome Measures

Name	Time	Method
Subject Reported Overall Lens Comfort at Day 7	Evaluated at Day 7	The overall lens comfort was assessed at Day 7 using the Contact Lens User Experience (CLUE) questionnaire. CLUE is a validated patient-reported outcomes questionnaire to assess patient-experience attributes of soft, disposable contact lenses (comfort, vision, handling, and packaging)in a contact lens wearing population in the US, ages 18-65. Scores follow a normal distribution with a population average score of 60 (SD 20), where higher scores indicate a more favorable /positive response. 97% of the scores fall within 0 and 120 (mean +/-3\*SD).
Subject Reported Overall Lens Comfort at Day 14	Evaluated at Day 14	The overall lens comfort was assessed at Day 14 using the CLUE questionnaire. CLUE is a validated patient-reported outcomes questionnaire to assess patient-experience attributes of soft, disposable contact lenses (comfort, vision, handling, and packaging)in a contact lens wearing population in the US, ages 18-65. Scores follow a normal distribution with a population average score of 60 (SD 20), where higher scores indicate a more favorable /positive response. 97% of the scores fall within 0 and 120 (mean +/-3\*SD).