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Multifocal IOL with add power performs well at all distances, study shows
Aspheric lens implantation led to a high degree of patient satisfaction and spectacle independence.
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 Thomas Kohnen |
ROME — Bilateral implantation with a multifocal lens provides patients with good vision at all distances, according to 3- to 6-month outcome data of a study on 20 patients.
The ReSTOR SN6AD1 (Alcon) is an aspheric apodized diffractive IOL model with a +3 add power.
“Compared with the +4 add model, this lens moves near vision slightly backward, which in my opinion is more convenient for the patient,” Thomas Kohnen, MD, said here at the winter meeting of the European Society of Cataract and Refractive Surgeons.
The result is good vision at all distances, including intermediate, which is a known weak point of multifocal IOLs.
Inclusion criteria
The patients included in the study were good candidates for multifocal IOLs who expressed interest in presbyopic correction and a need for good intermediate vision. Preoperative testing included visual acuity examination, contrast sensitivity, low contrast acuity and defocus measurement.
Prof. Kohnen said the implantation of the lens led to a high degree of patient satisfaction, self-reported functionality at all distances and a high degree of spectacle independence.
Results
At 6 months, mean uncorrected near vision was a little worse than 20/20, with a best near focus at about 37 cm.
The average uncorrected vision within the intermediate range of 50 cm to 70 cm was 20/30 or better.
“Patients reported no or minimal difficulty with intermediate tasks such as using a computer or shopping,” Prof. Kohnen said.
Mean distance vision at 4 m was 20/20 or better. Low contrast acuity (25%) was about 20/32 under both photopic and mesopic conditions.
Glare and halos were rated none to minimal in 64% of the patients, were less than before surgery and tended to decrease over time.
“We have moved from the +4 to the +3 add and now implant only this model in our candidates to ReSTOR multifocal lenses,” Prof. Kohnen said. – by Michela Cimberle
- Thomas Kohnen, MD, can be reached at Goethe Universität, Department of Ophthalmology, Theodor-Stern-Kai 7, D-60590 Frankfurt am Mein, Germany; +49-069-63013945; fax +49-069-63013893; e-mail: kohnen@em.uni-frankfurt.de. Dr. Kohnen has no direct financial interest in the products discussed in this article, nor is he a paid consultant for any companies mentioned.