The purpose of the study is to see if brighter lights will allow for shortening of the
treatment time required to stabilize the eyes of patients with keratoconus or a bulging
cornea. The investigators will be comparing the therapeutic effects of two different higher
brightnesses of ultra violet light on a riboflavin treated eye. One light will be twice as
bright as the other and the exposure time of these brighter lights to deliver equivalent
energy to the cornea will be reduced from the standard 30 minutes to 10 and 5 minutes.
Riboflavin is vitamin B2 and the investigators are trying to determine if an identical
clinical effect can be achieved the brighter treatment lights are used for shorter times. The
investigators will also monitor the clinical effect and the status of the cornea to see if
additional risks are associated with the brighter light.