Dispensing Overnight Study in Lenses

The purpose of the study is to evaluate the fit and performance of an investigational soft contact lens in comparison with a currently marketed lens. Both lenses will be worn on a continuous wear basis, which means the lenses will be worn while sleeping. Physiological changes will be monitored and subjective ratings collected.

Inclusion criteria

• Has had an oculo-visual examination in the last 2 years.
• Is between 18-45 years old and has full legal capacity to volunteer.
• Has read and understood the Information Consent Letter
• Is willing and able to follow participant instructions for product usage and meet the protocol-specified schedule of follow-up visits.
• Is correctable with the prescription of the available lenses (-1.00 to -4.00 DS in 0.50D step).
• Is correctable to at least 20/40 distance visual acuity with contact lenses in each eye.
• Is a current soft contact lens wearer (both daily wear and extended wear experience allowed).
• Has refractive astigmatism of <= 1.00 diopters
• Has clear corneas and ocular clinical findings considered to be "normal".

Exclusion criteria

• Has any systemic disease affecting ocular health.
• Is using any systemic or topical medications that will affect ocular health.
• Has any ocular pathology or severe insufficiency of lacrimal secretion (dry eyes) that would affect the wearing of contact lenses.
• Has any clinically significant lid or conjunctival abnormalities, neovascularization, corneal scars or corneal opacities.
• Has limbal injection, bulbar injection or corneal staining that, in the Investigator's opinion, is clinically significant.
• Has never worn contact lenses before.
• Has corneal distortion resulting from rigid lens wear.
• Is aphakic.
• Has undergone corneal refractive surgery.
• Is participating in any other type of clinical or research study.