Clinical Evaluation of Hydrogels vs Silicone Hydrogel Contact Lenses

Inclusion Criteria:

A person is eligible for inclusion in the study if he/she:

- Is between 18 and 40 years of age (inclusive)

- Has had a self-reported visual exam in the last two years

- Is an adapted soft (contact lens) cl wearer

- Has a cl spherical prescription between -1.00 and -6.00 (inclusive)

- Has a spectacle cylinder up to 0.75D in each eye

- Is correctable to a visual acuity of 20/25 or better in both eyes

- Has clear corneas and no active ocular disease

- Has read, understood and signed the information consent letter

- Is willing to comply with the wear schedule

- Is willing to comply with the visit schedule

Exclusion Criteria:

A person will be excluded from the study if he/she:

- Has never worn contact lenses before

- Currently wears rigid gas permeable contact lenses

- Has a history of not achieving comfortable CL wear (5 days per week; > 8 hours/day)

- Has a CL prescription outside the range of -1.00 to -6.00D

- Has a spectacle cylinder ≥ 1.00D of cylinder in either eye

- Has best corrected spectacle distance vision worse than 20/25 in either eye

- Has any systemic or topical medications that will affect ocular health

- Has any ocular pathology or severe insufficiency of lacrimal secretion

- Has persistent, clinically significant corneal or conjunctival staining

- Has active neovascularization or any central corneal scars

- Is aphakic

- Is presbyopic

- Has undergone corneal refractive surgery

- Is participating in any other type of eye related conical or research study