CLINICAL OUTCOMES OF USING CONTROLLED POSITIVE SPHERICAL ABERRATION TO TREAT MYOPIC PRESBYOPES WITH SCHWIND TECHNOLOGY

To outline the 3-month and 12-month postoperative visual outcomes utilizing positive spherical aberration to create centre distance, peripheral near PresbyMAX profiles (SCHWIND eye‑tech‑solutions GmbH, Kleinostheim, Germany) in myopic presbyopes.

Cathedral Eye Clinic, Belfast, Northern Ireland, UK. 

This study included 10 patients who received bilateral PresbyMAX reversal. The dominant eye was targeted for emmetropia, and the non-dominant eye was targeted between -0.89 and -1.25 D. An addition of 1.25D to 1.50D was utilized. The uncorrected distance (UDVA), intermediate (UIVA), and near (UNVA) visual acuity and refractive error were assessed 3 and 12 months postoperatively.

The monocular UDVA in the dominant eye was -0.02 ± 0.06logMAR, and 0.42 ± 0.18logMAR in the nondominant eye at 3 months, and -0.02 ± 0.07 and 0.38 ± 0.16logMAR respectively at 12 months. The monocular UNVA was 0.51 ± 0.11 and 0.56 ± 0.16logMAR in the dominant at 3 and 12 months, and 0.11 ± 0.16 and 0.09 ± 0.11logMAR in the nondominant eye. The binocular UDVA and UNVA was -0.02 ± 0.05logMAR and 0.11 ± 0.16 logMAR respectively at 3 months, and -0.04 ± 0.05 and 0.07 ± 0.10logMAR at 12 months. Two eyes had refractive spherical equivalent > 1.00 D at 3 months. Both eyes had LASIK enhancement before the 12-month assessment. At 12 months 85.7% within ± 0.50D, and 100% within ± 1.00D.

The PresbyMAX reversal positive spherical approach for myopes provided a range of clear vision from distance to near at both 3 and 12 months. Some patients experienced cross-blur in the early postoperative stage, and patients may need counselled accordingly. Refractive accuracy will improve further with more cases and optimization.