advanced keratoconus Los Angeles keratoconus expert dr. Khanna opines that keratoconus is a progressive disease. It needs to be diagnosed and treated before it reaches an advanced state. Keratoconus is a marching disease. In advanced keratoconus Los Angeles patients have marked decrease of vision. Glasses may not be any good and even contact lens may be futile. Cone can be detected on topography. Cornea may be very thin and have scarring. Intacs or cornea cross linkage also may be too late an option. Therefore if you have been diagnosed with keratoconus contact Los Angeles specialist on cornea- Rajesh Khanna , MD