Multifocal-toric IOL Compared to Multifocal IOL Combined With Limbal Relaxing Incisions for Correction of Moderate Astigmatism During Cataract Surgery

Primary outcomes

1. Composite scoring of unaided distance and near vision (monocularly)

   Time frame: 3 months

   Measurement of uncorrected and best corrected visual acuity will be done using a back-lit EDTRS chart placed at 4m.

   Near and distance unaided and corrected visual acuity will be measured, measuring reading speed, reading acuity and critical print size monocularly (Salzburg Reading Desk) and contrast vision under photopic and mesopic conditions (Pelli-Robson Chart).

   Reading speed, reading acuity and critical print size monocularly (Salzburg Reading Desk). The Salzburg Reading Desk (SRD) is the prototype of a reading chart that measures reading speed and reading distance. Contrast and light conditions are preset and reading distance (+/- 0.2 cm), reading speed and their changes during the examination are measured. This ensures an objective evaluation of measurements under the same conditions at every follow-up.

2. Residual astigmatism evaluation by Subjective Refraction and autorefraction (Topcon)

   Time frame: 3 months

   Measurement of residual astigmatism will be derived from autorefraction with an autorefractor (Topcon) with mean reading of 5 consecutive measurements in IOL mode, a subjective refraction by an optometrist using trial lenses and the cross cylinder method. All these measurements are non-invasive, non-contact and readily used in daily clinical practice.