Partial CXL to Prevent Regression in Hyperopic LASIK: 3-Year Follow-up
To evaluate the long-term efficacy of partial crosslinking in preventing the regression of hyperopia.
Consecutive patients were enrolled to have hyperopic Lasik initially without and subsequently with partial corneal crosslinking. Partial corneal crosslinking was conducted at the time of LASIK with a riboflavin soak time of 1:15 min and an exposure time of 1:15 to 30 mJ. They were followed with sequential topographies and refractions for a minimum of 3 years.
There were no significant differences in the preoperative parameters and minimal at year 1. After 2 years there was a mean of 0.75 diopters of hyperopic regression in the non-crosslinked patients vs. none in the crosslinked patients P.03 with and associated topographic regression P .03. At year 3 the mean regression in the non-crosslinked group was +1.3 diopters vs. +.2 diopters in the crosslinked group P<.03 and a topographic regression of 1.98 diopters vs. 0.4 diopters respectively. Neither group had any complications.
Partial crosslinking might be useful in reducing the regression after hyperopic LASIK.