Corneal Oxygen Uptake With Apioc Contact Lenses

Inclusion Criteria: 1. Provide informed consent. 2. Appear willing and able to adhere to instructions set forth in the protocol. 3. Be between the ages of 18 and 45. 4. Be an experienced contact lens wearer. 5. Be an eyecare clinician or clinician-in-training. 6. Flat and steep keratometry readings within 40 to 50D. 7. Clear, healthy corneas with no irregular astigmatism. 8. Normal, healthy conjunctiva in both eyes. 9. Be able to provide corneal topography measurements. 10. Be able to provide manifest refraction measurements. Exclusion Criteria: 1. Irregular corneal astigmatism. 2. Use of topical or systemic antihistamines within the previous week. 3. Use of topical ophthalmic drops within the previous two days. 4. History of corneal surgery. 5. Currently pregnant or lactating. 6. Systemic disease that would interfere with contact lens wear. 7. Previous diagnosis of dry eye syndrome.