Performance of Fanfilcon A Toric Lenses After at Least One Month Wearing Enfilcon A Toric Lenses

The aim of this study is to determine if adapted contact lens wearers enfilcon A toric lenses can be confidently refit into fanfilcon A toric lenses and can be successful after one month of daily wear.

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 eye exam in the last two years
• Is a habitual soft toric lens wearer
• Can be successfully fit with study lenses (≥ grade 2 fit acceptance)
• Has a contact lens spherical prescription between -1.00 to -6.00D with a cylinder between -0.75 and -1.75D (Diopters) (inclusive)
• Has a spectacle cylinder of at least 0.75D in each eye.
• Can achieve best corrected spectacle refraction distance visual acuity of 20/25 (0.10 logMAR) or better in each eye.
• Can achieve a distance visual acuity of 20/30 (0.18 logMAR) or better in each eye with the study contact lenses.
• Has clear corneas and no active ocular disease
• Has read, understood and signed the information consent letter
• Has a contact lens refraction that fits within the available parameters of the study lenses
• Is willing to comply with the wear schedule (at least 5 days per week, > 8 hours/day assuming there are no contraindications for doing so)
• Is willing to comply with the visit schedule.

Exclusion criteria

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

• Has a history of not achieving comfortable CL (Contact Lens) wear (5 days per week; > 8 hours/day)
• Presents with clinically significant anterior segment abnormalities
• Presents with ocular or systemic disease or need of medications which might interfere with contact lens wear
• Presents with slit lamp findings that would contraindicate contact lens wear such as:

• Pathological dry eye or associated findings
• Significant pterygium, pinguecula, or corneal scars within the visual axis
• Neovascularization > 0.75 mm in from of the limbus
• Anterior uveitis or iritis (or history in past year)
• Seborrheic eczema of eyelid region, Seborrheic conjunctivitis
• History of corneal ulcers or fungal infections
• Poor personal hygiene
• Has a known history of corneal hypoesthesia (reduced corneal sensitivity)
• Has aphakia, keratoconus or a highly irregular cornea.
• Has presbyopia or has dependence on spectacles for near work over the contact lenses.
• Has undergone corneal refractive surgery.
• Is participating in any other type of eye related clinical or research study.
• Is frequently using rewetting/ lubricating eye drops (more than once per day)