To establish reference values for SF, CIM, and TKM in subjects with normal corneas.~To establish reference values for SF, CIM, and TKM in subjects who underwent myopic laser vision correction.~To establish reference values for SF, CIM, and TKM in subjects who underwent hyperopic laser vision correction.~To establish reference values for SF, CIM, and TKM in subjects who were diagnosed to have keratoconus.~To establish reference values for SF, CIM, and TKM in subjects with history of orthokeratology.~To establish reference values for SF, CIM, and TKM in subjects with previously diagnosed corneal conditions (diseases/pathologies/surgeries) affecting the corneal surface that are not listed above.~To determine the repeatabiltity and reproducibility of the Atlas II corneal topographer in normal human corneas using true elevation data and axial curvature.~To determine the sensitivity, specificity, and accuracy of the Pathfinder II Corneal Analysis software in discriminating normal corneas from previously diagnosed corneal conditions (diseases/pathologies/surgeries) affecting the corneal surface (Phase II).
The purpose of this study is to determine the ability of a proprietary software screening tool to discriminate normal corneas (front surface of the eye) from previously diagnosed corneal conditions (diseases/surgeries/pathologies) and to determine the repeatabiltity and reproducibility of the Atlas II corneal topographer in normal human corneas.