Abstract

P 128

Functional results after cataract surgery with implantation of bifocal intraocular lenses – a prospective study

Alexandra Anton, Florian Birnbaum, Martin Schmidt, Thomas Reinhard
Universitäts-Augenklinik Freiburg

Background and purpose
The use of multifocal intraocular lenses in cataract surgery is increasing. A decreased visual acuity in long distance, an unsatisfying ability to read and glare are the major problems of multifocal lenses. In this prospective study we investigated the functional results following implantation of the diffractive-refractive AT.LISA 366D in comparison to the monofocal AT.Smart 46LC. The AT.LISA 366D has a light distribution of 65% for distance and 35% for the near range. The diffractive optics of the lens are designed to be independent of pupil size. Smooth steps in diffractive structure should reduce glare.
Methods
10 patients received binocular a bifocal intraocular lens (AT.LISA 366D) or a monofocal intraocular lens (AT.Smart 46LC), respectively. Postoperative evaluation 6 weeks after surgery included: uncorrected and best corrected visual acuity for distance (Freiburg Visual Acuity Test) and proximity (Birkhäuser charts), binocular visual acuity after surgery of the second eye, contrast sensitivity (Freiburg Visual Acuity Test) and colour perception (Farnsworth-Panel-D15-Test). The subjective assessment of photoptic phenomena and patient satisfaction was evaluated by a standardised questionnaire.
Results
We found a high patient satisfaction following implantation of the AT.LISA 366D. The use of spectacles was necessary in 2 patients. The uncorrected visual acuity for distance was 0.63 bis 1.26, the best corrected visual acuity for distance was 0.79 bis 1.26 and visual acuity for proximity was up to 1.0. In the control group the best corrected visual acuity for distance was up to 1.26 and the visual acuity for proximity up to 0.2 (means were generated from logMAR values).
Conclusions
Implantation of a bifocal intraocular lens showed a good visual performance for distance and near in this prospective study. The patient contentment was high, as in most cases no spectacles were necessary. 

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