ASTIGMATISM TOLERANCE AND VISUAL OUTCOMES AFTER BILATERAL IMPLANTATION OF A DIFFRACTIVE-REFRACTIVE CONTINUOUS TRANSITIONAL FOCUS IOL

to evaluate the astigmatism tolerance and the visual outcomes after implantation of a premium IOL with a continuous transitional focus (Precizon Presbyopic) in pseudophakic presbyopia correction.

Ophthalmic Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona,

this prospective study enrolled 20 patients (40 eyes) after bilateral phacoemulsification and IOL implantation. Distance corrected and uncorrected visual acuities at 4 meters, 80, 67, and 40 centimeters (DCVA, UDVA, DCI80VA, UI80VA, DCI67VA, UI67VA, DCNVA, UNVA), astigmatic and spheric defocus curve, mean reading speed (MRS), contrast sensitivity, optical aberrations (MTF cut-off, Strehl ratio and HOA RMS), objective halometry and NEI-42 questionnaire were evaluated 3 months after surgery.

Astigmatic defocus curves revealed a tolerance up to -1.00 D and +0.75 D for the with the rule astigmatism, and up to -1.00 D and +1.00 D for the against the rule. Binocular spheric defocus curve showed that the mean visual acuity was higher than 0.15 logMAR from 1.0 to -1.0 D. MRS, MTF cut-off, Strehl ratio and HOA RMS were found 116.97 (± 21.94) words/min, 20.03 (±4.86) cpd/deg, 0.11 (±0.07) and 0.28 (±0.09), respectively. Contrast sensitivity was within the normal range for all tested light conditions. The NEI RQL-42 evidenced high subjective satisfaction for all the subscales, especially for far vision, activity limitations, dependence on correction, suboptimal correction, appearance and satisfaction with correction.

The Precizon Presbyopic IOL allows both good astigmatism tolerance and objective and subjective high quality of vision.