EyeWorld India June 2015 Issue

20 June 2015 EWAP FEATURE New - from page 19 Lens shows good uncorrected intermediate vision and a near- absence of unwanted visual symptoms in European population A n ongoing European multisite 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 diffractive 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 accommodative IOL or Table 1: Binocular uncorrected visual acuity Figure 1: Percent of patients able to perform daily activities without glasses Figure 2: Percent of patients reporting that activities are easy/acceptable to do postop Source (all): Frank Goes, Jr., MD 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 function comfortably without eyeglasses. Interim results for 82 subjects who had reached the 1-month postoperative 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, through 2.0 D of defocus on average. Binocular uncorrected visual acuity results are shown in Table 1. The majority reported never or rarely using glasses and said they were able to perform daily activities at near, intermediate, and far New lens seeks to solve problems of presbyopia-correcting IOLs by Frank Goes, Jr., MD