Optimization for Toric Contact Lenses

Optimization for Toric Contact Lenses

The aim of this study is to evaluate the agreement between subjective and objective toric lens prescriptions.

To evaluate agreement between subjective and objective optimized toric contact lens prescriptions.

Inclusion Criteria:

1. They are at least 18 years of age.
2. They understand their rights as a research participant and are willing and able to sign a Statement of Informed Consent.
3. They have spherical refractive error at the corneal plane between +4.00 to -7.00DS
4. They have refractive astigmatism at the corneal plane of 0.75 to 2.25DC in one eye.
5. They are able to achieve distance HCHL visual acuity of +0.10 logMAR or better in each eye
6. They are a current soft contact lens wearer or have previous experience of successful soft contact lens wear in the past 3 years.

Exclusion Criteria:

1. Is participating in any concurrent clinical or research trial.
2. They have an ocular disorder which would normally contra-indicate contact lens wear.
3. They have a systemic disorder which would normally contra-indicate contact lens wear.
4. They are pseudophakic or aphakic.
5. They have had corneal refractive surgery.
6. They have any corneal distortion resulting from previous hard or rigid lens wear or have keratoconus.
7. Is using any systemic or topical medications that in the opinion of the investigator may affect contact lens wear or a study outcome variable.