EVALUATION OF AN ACCOMMODATING INTRAOCULAR LENS
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INTRODUCTION: Conventional intraocuiar lenses (10Ls) that focus light at a fixed distance provide excellent visual outcomes in most patients who have cataract extraction. However, most patients require reading glasses or bifocals for near vision. Steinert et at (1999). Replacing the natural lens with a multifocal intraocu kw lens that provides multiple focal distances for both near and distance vision offers an alternative to patients who need near vision correction after cataract surgery, Woiffsohn, et at. (2006). The optical quality of the retinal image is worse than the retinal image produced with a monofocal IOL. The loss of image quality can affect visual performance and has led to an interest in alternative modalities for correcting near vision in pseudophakic patients, Steinert et at (1999). By using the new accommodating 10Ls, ophthalmic surgeons will be able to provide a full range of visual focus in each eye of a patient to maintain binocular function while also avoiding visual disturbances that are experienced with monovision and multifocal 10Ls, Doane (2004) . The CrystnItms AT-45 (Eyeonics), is an accommodating, foldable, multi- piece plate shaped 10L. (Eyeonics Crystalens fact sheet). AIM OF THE WORK: This research was designed to study the efficiency of the foldable accommodating IOL; Crystalens (AT-45) in the restoration of both distant and near visual acuity after phacoernulsification. Also, assessment of the 10L's possible displacement during accommodation and the accompanying modifications of the ciliary body and anterior chamber depth by using ultrasound biomicroscopy (UBM).