It is extremely unlikely that LASIK surgery will result in blindness or severe vision loss, although complications can occur. No cases of blindness have been reported due to LASIK. In fact, 99% of LASIK patients achieve better than 20/40 vision after the procedure. Over 90 percent of people achieve 20/20 vision or better. The LASIK procedure is so successful that more than eight out of ten people no longer need to wear glasses or contacts as a result.