Complications arising from modern laser eye surgery are very rare. A study of patients in the American Armed Forces demonstrated that of 112,500 recruits who underwent laser eye surgery between 2000 and 2008, only 1 patient experienced significant complications as a result.
In the 1990s it was estimated that up to 5% of patients deemed as suitable candidates for laser eye surgery might expect to experience some form of post-operative complication. Today, thanks to ongoing improvements in laser eye surgery technology, less than 1% of patients are estimated to experience complications.
Where complications do arise, virtually 100% can be successfully addressed with further treatment. In the UK, up to 150,000 patients opt for laser eye surgery each year, with 99% of patients obtaining 20/20 vision or better as a result.