Unilateral Post-LASIK Ectasia and Contralateral Spontaneous Ectasia.

PURPOSE

To report a case of iatrogenic unilateral post-LASIK corneal ectasia with contralateral spontaneous ectatic evolution.

METHODS

Case report with preoperative and postoperative measurements including uncorrected visual acuity, corrected distance visual acuity, refraction, slit-scanning topographic and pachymetric maps, and differential maps.

RESULTS

Six months after unilateral LASIK, the operated eye progressively developed signs of post-LASIK ectasia with increased inferior corneal steepening and corneal thinning and decrease in corrected distance visual acuity. Five years later, the unoperated eye also developed signs of spontaneous ectatic evolution with increased inferior steepening and corneal thinning.

CONCLUSIONS

LASIK accelerates occurrence of ectasia in ectasia-susceptible and biomechanically fragile eyes.