title: Two year results: sharp versus rounded optic edges on silicone lenses.
abstract: To evaluate the role of optic edge design of 2 silicone intraocular lenses (IOLs) in 2 year clinical results. Department of Ophthalmology, University of Vienna, Medical School, Allgemeines Krankenhaus, Austria. In this comparative clinical study, 50 eyes had phacoemulsification and implantation of a high-refractive 3-piece silicone IOL with sharp optic edges (CeeOn model 911F) (n = 25) or a 3-piece silicone lens with rounded optic edges (CeeOn model 920) (n = 25). Biomicroscopic findings, including those of specular microscopic examination of the anterior lens surface, were documented and the results analyzed. After 2 years, a significant between-group difference in posterior capsule opacification (PCO) but not in anterior capsule alterations was observed. Behind all CeeOn 911F sharp-edge IOLs, the capsule remained clear; in 2 of 23 capsules behind the CeeOn 920 rounded-edge, a neodymium: YAG laser capsulotomy had to be performed for dense central fibrotic PCO. Seven of 21 of the remaining eyes had first-degree central fibrotic PCO, 14 of 23 had peripheral mixed fibrotic and slender Elschnig pearl PCO, and 8 of 23 had second-degree peripheral PCO. Specular microscopic findings did not differ between the 2 groups. No severe IOL decentration occurred in any eye; 25% in the sharp-edge group and 40% in the rounded-edge group had minimal decentration. The silicone IOL with the sharp optic edge design was associated with significantly reduced PCO 2 years postoperatively.
authors.affiliation: Department of Ophthalmology, University of Vienna, Medical School, Allgemeines Krankenhaus, Vienna, Austria.
authors.forename: A J
authors.initials: AJ
authors.lastname: Kruger
authors.forename: J
authors.initials: J
authors.lastname: Schauersberger
authors.forename: C
authors.initials: C
authors.lastname: Abela
authors.forename: G
authors.initials: G
authors.lastname: Schild
authors.forename: M
authors.initials: M
authors.lastname: Amon
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001672:Biocompatible Materials; D002386:Cataract / Q000209:etiology* / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053685:Laser Therapy; D007903:Lens Capsule, Crystalline / Q000473:pathology* / Q000601:surgery; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011474:Prosthesis Design; D012029:Refraction, Ocular; D012826:Silicone Elastomers / Q000009:adverse effects*; D016896:Treatment Outcome; D014792:Visual Acuity
chemical_list: D001672:Biocompatible Materials; D012826:Silicone Elastomers