Soft Lens Study: Biomedics 1 Day Extra Sphere and Clariti 1 Day Sphere

The aim of this study is to evaluate and compare the performance of two soft contact lenses.

Inclusion Criteria: 1. Are at least 18 years of age and have full legal capacity to volunteer; 2. Have understood and signed an information consent letter; 3. Are willing and able to maintain the appointment schedule; 4. Are an adapted soft contact lens wearer; 5. Have a vertex-corrected contact lens prescription of -1.00DS to -6.00DS (inclusive) in each eye; 6. Have a refraction with a cylinder component of no more than -1.00DC in each eye; 7. Can be fitted with and achieve a distance visual acuity of +0.10 logMAR or better in each eye with the study contact lenses. Exclusion Criteria: 1. Are participating in any concurrent clinical or research study; 2. Have any known active ocular disease and/or infection or slit lamp findings that would contraindicate contact lens use; 3. Have a systemic condition that would contraindicate contact lens use; 4. Are using any systemic or topical medications that would contraindicate contact lens use; 5. Have known sensitivity to the diagnostic fluorescein sodium to be used in the study; 6. Are an employee of the Centre for Ocular Research \& Education directly involved in the study (i.e. on the delegation log).