For those who need radial keratotomy (RK) re-treatments, it has been reported by the RK Re-treatment Study that PRK is safer than LASIK.
The RK Re-treatment Study group, led by ophthalmologists, looked at 221 procedures over a 12 year period between 1997 and 2010 from six different US surgical centers. All but three LASIK procedures were done conventionally, while two-thirds of the PRK procedures were conventional. The other one-third were wavefront-guided custom PRK. (Wavefront-treatment did not become popular until around 2005.) Refractive errors between PRK and LASIK patients were roughly the same.
Three to six months after eye surgery, both conventional LASIK and wavefront-guided PRK showed better at keeping best-corrected visual acuity in patients than was conventional PRK. Nearly 80% of all patients showed better than 20/40 vision after eye surgery.
However, for patients who needed to be retreated, there were complications in 12% of the custom LASIK patients, while only 4% of PRK patients had complications. Complications included ectasia in the LASIK group, which required penetrating keratoplasty. Two patients in the PRK group required both eyes needing phototherapeutic keratectomy due to “postoperative haze.” Retreatment gave these patients 20/20 and 20/25 vision respectively.
The RK Re-treatment Study recommends further evaluation in this area of laser vision correction. This may be especially important due to the increasing number of people seeking vision correction surgery.
If you are interested in finding out more about PRK or LASIK, please find a doctor in your area through eyes.com today.