Surface quality of flexible silicone intraocular lenses. A scanning electron microscopy study

Klinische Monatsblätter für Augenheilkunde
T KohnenD D Koch

Abstract

Soft intraocular lenses (IOLs) have been developed to be folded during insertion to allow implantation through a small incision. The surface of the IOL is of great importance in postoperative inflammation and long-term acceptance of the implant. Rough and sharp edges can damage delicate intraocular tissues. The purpose of this study was to analyze new, foldable silicone IOLs for surface quality prior to and following folding. Eleven silicone IOLs of different types were included in this study (four one-piece plate-haptic silicone IOLs and seven three-piece silicone IOLs with polypropylene, PMMA or polyimid haptics). We performed scanning electron microscopy on brand-new IOLs prior to and following folding either with forceps or inserter. Special attention was given to the silicone optic surface, optic edges, haptic-optic junctions and the haptic itself. Photographs were taken at 5-350 times magnification. All IOLS demonstrated a smooth and homogeneous optic surface at low magnification. At high-power magnification (X 350), distinctive surface patterns were evident in some IOLs, which turned out to be artefacts. The edge finish showed surplus silicone material and molding flash in six of 11 IOLs. Positioning holes of the 4 plate...Continue Reading

Citations

Nov 24, 1999·Journal of Cataract and Refractive Surgery·G HäringS Behrendt
Jan 1, 1996·Journal of Cataract and Refractive Surgery·T KohnenD D Koch
Dec 4, 2001·Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·G U Auffarth, D J Apple

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