Study finds regression in LASIK at 8 years

Kimiya Shimizu, MD
Kimiya Shimizu

BEIJING — Long-term studies showing refractive instability and decreased visual performance between 6 and 8 years after LASIK has convinced a surgeon speaking here to abandon LASIK in his practice.

Kimiya Shimizu, MD, presented results here at the 25th APAO Congress Subspecialty Day of one study in which 44 eyes of 22 patients showed a regression in visual acuity and predictability at 6 and 8 years post-LASIK, especially in highly myopic eyes.

At 6 and 8 years respectively, only 53% and 39% of highly myopic eyes had visual acuity of 20/20 uncorrected, Dr. Shimizu showed. Highly myopic eyes were those equal to or greater than -6 D.

LASIK induces long-term instability due to regression, Dr. Shimizu said.

Another study of 47 eyes of 28 patients showed a significant increase in higher order aberrations occurred even after wavefront-guided LASIK, he said.

"Contrast sensitivity decreased following wavefront-guided LASIK," Dr. Shimizu said. "So, I have stopped doing LASIK,"

Dr. Shimizu said he now performs PRK in patients with a refractive correction below –5 D, implants a phakic IOL to correct between –5 D and –11 D and performs bioptic ICL and PRK for correction of more than –12 D.

Kimiya Shimizu, MD
Kimiya Shimizu

BEIJING — Long-term studies showing refractive instability and decreased visual performance between 6 and 8 years after LASIK has convinced a surgeon speaking here to abandon LASIK in his practice.

Kimiya Shimizu, MD, presented results here at the 25th APAO Congress Subspecialty Day of one study in which 44 eyes of 22 patients showed a regression in visual acuity and predictability at 6 and 8 years post-LASIK, especially in highly myopic eyes.

At 6 and 8 years respectively, only 53% and 39% of highly myopic eyes had visual acuity of 20/20 uncorrected, Dr. Shimizu showed. Highly myopic eyes were those equal to or greater than -6 D.

LASIK induces long-term instability due to regression, Dr. Shimizu said.

Another study of 47 eyes of 28 patients showed a significant increase in higher order aberrations occurred even after wavefront-guided LASIK, he said.

"Contrast sensitivity decreased following wavefront-guided LASIK," Dr. Shimizu said. "So, I have stopped doing LASIK,"

Dr. Shimizu said he now performs PRK in patients with a refractive correction below –5 D, implants a phakic IOL to correct between –5 D and –11 D and performs bioptic ICL and PRK for correction of more than –12 D.