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Trifocality shows advantages over extended range of vision
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The trifocal AcrySof IQ PanOptix and the extended-range-of vision Tecnis Symfony, from Alcon and Abbott, respectively, are both good options for patients, with a slight advantage of trifocality for near vision tasks. However, the perception of visual side effects with both lenses should be considered when counseling patients, according to a study.
Three groups of 20 presbyopic patients were assigned to be bilaterally implanted with one of the two multifocal lenses or a monofocal SN60WF Acrysof (Alcon). Patients and examiners performing outcome assessments were blinded to which IOL was implanted to avoid bias.
The visual performance for distance was similar between the three groups, both for monocular and binocular vision. Intermediate vision was better in the two multifocal IOL groups as compared with the monofocal IOL group, while patients implanted with the trifocal lens did significantly better at near.
The authors specified that “the lower near-vision performance of the extended range of vision IOL compared with the trifocal IOL is a new finding.”
Total and intraocular high-order aberrations at a 3-mm pupil diameter were not statistically different in the multifocal IOL groups as compared with the monofocal IOL group, but primary spherical aberration was significantly lower in the trifocal IOL group. Retinal straylight did not differ statistically between the three groups.
In the quality of vision questionnaire, the dysphotopsia score of both multifocal IOLs was significantly higher than the monofocal IOL score. Halo was the most frequently reported and most bothersome symptom. According to the authors, this suggests that, despite the technical advancements, “patients should still be carefully counseled about these effects before they have implantation of a multifocal IOL.” – by Michela Cimberle
Disclosure: The authors reported no relevant financial disclosures.
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