Colorado accommodating iol
The diffractive IOL group received a Tecnis ZM900 (Advanced Medical Optics Inc [AMO], Santa Ana, California, USA), a 3-piece silicone IOL with an anterior modified prolate surface and a diffractive posterior surface. The refractive multifocal IOL group received a Rezoom (AMO) hydrophobic acrylic 3-piece IOL with 5 refractive optical zones on the anterior surface; the first, third, and fifth zones were designed for distance vision and the second and fourth zones for near vision.
This prospective nonrandomized clinical study included 87 patients with unilateral cataract who were scheduled for cataract extraction and IOL implantation between February 2008 and June 2008.Several procedures are available including scleral expansion surgery, corneal inlays, zonal photorefractive keratectomy, accommodating intraocular lenses (IOLs), and various types of multifocal IOLs.Surgically created myopic astigmatism and monovision (unilateral myopia) may be used to compensate for pseudophakic presbyopia; however, both near and distance binocular visual function deteriorate with these techniques.Multifocal IOLs allow visual acuity over a wide range of distances and may have an additive effect on binocular vision in patients with unilateral cataract; however, this procedure has drawbacks such as low contrast sensitivity, haze, glare, and decreased night vision.The aim of this study was to evaluate and compare the clinical safety and efficacy of conventional monofocal IOLs, accommodating IOLs, and refractive and diffractive multifocal IOLs in presbyopic patients with unilateral cataract.Follow-up examinations were conducted at 1 and 2 weeks after surgery and then at 1, 3, 6, 9, 12, 14, and 18 months.
During each visit, a slit-lamp examination was performed and intraocular pressure was measured using Goldmann tonometry.
Intermediate and near visual acuity were measured in log MAR units with an ETDRS chart at 60 cm and 35 cm, respectively.
Binocular function was evaluated 18 months after surgery using the Titmus test (Stereo Optical Co, Chicago, Illinois, USA).
The monofocal IOL group received an Acrysof SA60AT foldable hydrophobic acrylic IOL with an optic diameter of 6.0 mm and total diameter of 13 mm (Alcon, Fort Worth, Texas, USA).
The accommodating IOL group received the 1CU Accommodative IOL, a foldable, hydrophilic acrylic posterior chamber IOL with an optic diameter of 5.5 mm and total length of 9.8 mm (Human Optics AG, Erlangen, Germany).
All surgeries were performed by the same surgeon (C. A 3-mm clear corneal tunnel incision was made at the steepest meridian, and capsulorhexis with a 5.0- to 5.5-mm hydrodissection, phacoemulsification of the nucleus, aspiration of the cortical remnants, and IOL implantation into the capsular bag were performed under topical anesthesia.