Eyeworld

EW REFRACTIVE SURGERY 100 March 2015 by Frank Goes Jr., MD Lens shows good uncorrected intermediate vision and a near- absence of unwanted visual symptoms in European population A n ongoing European mul- tisite study is evaluating the results of a new type of presbyopia-correcting IOL. The Tecnis Symfony lens (Abbott Medical Optics, Abbott Park, Ill.) is the first extended range of vision lens. It relies on a diffrac- tive echelette design that elongates the eye's focus to extend the range of continuous clear vision. The lens platform is the same as that of the Tecnis 1-piece, a hydrophobic acrylic with a known track record of stability and excellent optics. It is CE marked and commercially available in some European countries. It is important to recognize that this lens does not fit into any of our previous presbyopia-correcting IOL categories. It is not an accommo- dative IOL or a multifocal. While a multifocal IOL has 2 or 3 distinct foci, an extended range of vision lens elongates the focus of the eye; in the case of the Tecnis Symfony, it delivers a continuous, full range of high quality vision, much like the human crystalline lens. It also differs from extended depth of focus lenses, which provide some intermediate vision but no near. Interim results In the European study, 150 subjects undergoing bilateral cataract surgery or clear lens extraction (CLE) with implantation of the Tecnis Symfony lens have been enrolled. The study is designed to measure reading ability, functional near vision performance, image quality at different distance ranges, and patient-reported outcomes, such as satisfaction and the ability to func- tion comfortably without eyeglasses. Interim results for 82 subjects who New lens seeks to solve problems of presbyopia-correcting IOLs Frank Goes Jr., MD Figure 2: Percent of patients reporting that activities are easy/acceptable to do postop Source (all): Frank Goes Jr., MD Table 1: Binocular uncorrected visual acuity Figure 1: Percent of patients able to perform daily activities without glasses had reached the 1-month postopera- tive visit were recently reported. Patients in the study were able to maintain functional vision of 20/40 or better throughout the range from distance to near vision, continued on page 102 through 2.0 D of defocus on aver- age. Binocular uncorrected visual acuity results are shown in Table 1. The majority reported never or rare- ly using glasses and said they were able to perform daily activities at near, intermediate, and far distances (Figure 1), including key activities without glasses (Figure 2). Nearly all (98%) said they would recommend the TECNIS Symfony IOL to family and friends.

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