Keratoconus is a corneal disease that produces a number of vision problems including halos, double-vision, and severe irregular astigmatism. To learn more about keratoconus please check out the KCResources website where you can discover some of the many resources available for keratoconus (KC) patients and their families. Included at KCResources is a compilation of the current research, reference books, a clear explanation of keratoconus and treatments, as well as products especially chosen to help those with keratoconus.