Clinical Evaluation of Two Toric Contact Lenses in Current Non-toric Lens Users

This is an interventional treatment trial for Astigmatism Read More

Inclusion Criteria:

Subjects must satisfy the following conditions prior to inclusion in the study:

1. One of the following:

   1. Spherical contact lens user (minimum of 2 months wear, four days a week, 8 hours a day)
   2. Contact Lens drop-out (no contact lens wear in the last 6 months but wearing glasses at least four days a week,8 hours a day)
   3. Neophyte (no habitual contact lens wear except for trial fits up to 1 week, but wearing glasses at least four days a week,8 hours a day For patients not currently wearing lenses, patient should have expressed a desire to try lenses.
2. Between 16 and 60 years of age.
3. Have signed an informed consent form (documented by the investigator in the Case Report Form [CRF]).
4. Distance requirement in the range of +4.00D to -9.00D (i.e. -10.00D refractive)
5. Refractive astigmatism between -0.75D and -3.00D in both eyes.
6. Have best corrected VA of 6/9 (20/30) or better in each eye.

7. Have normal eyes with no evidence of abnormality or disease. For the purpose of this study a normal eye is defined as one having:

   1. No amblyopia.
   2. No evidence of lid abnormality or infection.
   3. No conjunctival abnormality or infection.
   4. No clinically significant slit lamp findings (i.e. stromal haze, staining, scarring, vascularisation, infiltrates or abnormal opacities).
   5. No other active ocular disease.
8. Presbyopes may be included (no monovision, no spectacles over contact lenses or bifocal glasses only)

Exclusion Criteria:

Any of the following will render a subject ineligible for inclusion:

1. Requires concurrent ocular medication.
2. Clinically significant (Grade 3 or 4) corneal stromal haze, corneal vascularisation, tarsal abnormalities, bulbar hyperaemia, limbal hyperaemia, or any other abnormality of the cornea that would contraindicate contact lens wear.
3. Corneal staining Grade 3 in more than two regions.
4. Extended wear in the last 3 months.
5. Has had any anterior ocular surgery. Has had any other ocular surgery or injury within 8 weeks immediately prior to enrollment for this study.
6. Abnormal lachrymal secretions.
7. Pre-existing ocular irritation that would preclude contact lens fitting.
8. Keratoconus or other corneal irregularity.
9. Any systemic illness which would contraindicate lens wear or the medical treatment of which would affect vision or successful lens wear.
10. Has diabetes.
11. Infectious disease (e.g., hepatitis, tuberculosis) or an immunosuppressive disease (e.g., HIV).
12. Pregnancy, lactating, or planning a pregnancy at the time of enrollment.
13. Participation in any concurrent clinical trial or in last 60 days.