iCare ST500 Clinical Trial

Inclusion Criteria: * Patients at least 18 years old Exclusion Criteria: 1. Subjects with only one functional eye 2. Subjects having poor or eccentric fixation in the study eye(s) 3. High corneal astigmatism \>3D in the study eye(s) 4. Central corneal scarring 5. History of prior incisional glaucoma surgery or corneal surgery, including corneal refractive laser surgery in the study eye(s) 6. Microphthalmos 7. Buphthalmos 8. Contact lens use within one week of continuous wear and within one hour if lens is worn occasionally 9. Dry eyes (clinically significant) 10. Lid squeezers - blepharospasm 11. Nystagmus 12. Keratoconus 13. Any other corneal or conjunctival pathology or infection relevant to this study 14. Central corneal thickness greater than 600 μm or less than 500 μm in the study eye(s) 15. Cataract Extraction within last 2 months in the study eye(s)