Screening Aid to Identify Corneas That May Have Pathologies or Other Conditions

Inclusion Criteria: Normals * Patients seeking initial laser vision correction that were screened to be good candidates for the procedure. * No history of refractive or other ocular surgery. * No corneal pathologies. * Normal corneal topography. * Contact lens wearers should discontinue use at least 2 weeks for hard contacts, and 3 days for soft lenses prior to imaging. Keratoconus * An irregular cornea determined by distorted keratometry mires, distortion of the retinoscopic, or ophthalmoscopic red reflex (or a combination of these) * At least one of the following biomicroscopic signs: Vogt's striae, Fleischer's ring of \>2 mm arc, or corneal scarring consistent with keratoconus. * Contact lens wearers should discontinue use preferably 1 day or at least half an hour prior to imaging. Myopic Laser Vision Correction Patients who have undergone myopic: * LASIK * PRK * LASEK Hyperopic Laser Vision Correction Patients who have undergone hyperopic: * LASIK * PRK * LASEK Orthokeratology * Patients using specially designed rigid contact lenses to reshape the cornea to temporarily reduce or eliminate refractive error. * Subjects must be 18 years of age or older; able and willing to make the required visit; and able and willing to give consent. Exclusion Criteria: * Patients that underwent corneal transplantation or any ocular surgery for the following categories: normal, keratoconus, and orthokeratology) * Any active infection or inflammation of the cornea. * PI decides that subject is not suitable due to medical risk.