Objective Testing of Tear Film Stability

Inclusion criteria

• The subject must be at least 18 years of age and no more than 80 years of age.
• The subject must have a best corrected visual acuity of 20/30 or better for each eye.
• The subject must habitually wear contact lenses.
• The subject must have had an eye exam within the last 12 months. The exam data must be available to the investigators prior to the first visit.
• The subject must have normal eyes, no use of ocular medications, no ocular infection of any type, and no ocular inflammation.
• The subject must read understand 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 that might interfere with contact lens wear.
• Systemic disease, autoimmune disease or use of medication which might interfere with contact lens wear.
• Clinically significant (FDA Scale 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 (FDA Scale grade 3 or 4) tarsal abnormalities or bulbar injection which might interfere with contact lens wear.
• Any ocular infection.
• Pregnancy or lactation.
• Diabetes
• Infectious diseases (e.g. hepatitis, tuberculosis)
• Contagious immunosuppressive diseases (e.g. HIV)