Efficacy of Scleral Contact Lenses for Daily Wear for Regular and Irregular Refractive Errors Compared to Habitually Worn Scleral Lenses

Inclusion Criteria: 1. Subjects may be male or female, of any race, and at least 18 years old at the time of the pre-treatment examination. 2. Subjects must habitually wear scleral contact lenses for an average wearing time of 6 hours per day. 3. The prospective eye(s) must have refractive hyperopia or myopia from +20.00 to -20.00 diopters sphere (spectacle plane), with up to -10.00 diopters of refractive astigmatism (spectacle plane), as determined by manifest refraction (phoropter or trial frame with a 12.5 mm vertex distance). 4. Subjects must have best spectacle corrected visual acuity of at least 0.5 logMAR in each eye. 5. Subjects must be willing and capable to return for all scheduled follow-up visits for a period of at least 3 months (minimum of 1 month from initial dispensing). Exclusion Criteria: 1. Female subjects who are pregnant, breast-feeding or intend to become pregnant over the course of the study. 2. Subjects with a history of any of the following medical conditions: collagen vascular disease, autoimmune disease, immunodeficiency diseases, ocular herpes zoster or simplex, endocrine disorders (including, but not limited to active thyroid disorders and diabetes), lupus, and rheumatoid arthritis. Note: The presence of diabetes (either type 1 or 2), regardless of disease duration, severity or control, will specifically exclude subjects from eligibility. 3. Subjects with active ophthalmic disease or abnormality including glaucoma, chorioretinitis, central retinal artery or vein occlusion, intraocular or ocular infection. 4. Subjects who are participating in any other clinical trial (FDA or other)