Evaluation of Eye Alignment Before and After Refractive Surgery Using an Implantable Collamer Lens in Phakic Patients...

To investigate changes in eye alignment before and after ICL implantation in patients with myopia having corrected distance visual acuity (CDVA) of ≥0.0 logMAR.

The medical records of 1012 patients without eye movement limitation who underwent bilateral ICL implantation were retrospectively reviewed a at the Eye Center of Sanno Hospital in Japan.

Preoperatively, of 1012 patients, 30 (3.0%), 211 (20.8%), 771 (76.2%), and 126 (12.5%) demonstrated constant strabismus, intermittent strabismus, phoria, and binocular diplopia, respectively. Regarding horizontal strabismus without a vertical component, of 30 patients, 9 (30.0%) demonstrated exotropia and 2 (6.7%) exhibited esotropia. Vertical strabismus without a horizontal component was not observed. A combination of horizontal and vertical strabismus was observed in 19 (63.3%) patients. The rate of eye alignment classification agreement preoperatively and postoperatively was 98.7%, including 100%, 93.8%, and 100% in the constant strabismus, intermittent strabismus, and phoria groups, respectively. Of 1012 patients, 1.3% converted from intermittent strabismus to phoria (6.2% in the intermittent strabismus group).

Uncomplicated ICL implantation under topical anesthesia was not associated with eye alignment in 98.7% of patients with myopia, and 0% transitioned to constant strabismus after ICL implantation.