Extent of damage to different intraocular lenses by neodymium:YAG laser treatment--an experimental study

Klinische Monatsblätter für Augenheilkunde
B DickN Pfeiffer

Abstract

Neodymium:YAG laser capsulotomy frequently damages the intraocular lens (IOL). This damage, mainly caused by acoustic shock wave and thermal conduction, results in opacities in the IOL, which may cause glare or image degradation. Because of the introduction of new IOL materials in cataract surgery, investigation of YAG laser resistance of these IOL materials seems to be necessary. A total of 17 standard IOLs of different types and classes of materials were tested as follows: Class I: Acrylate a) PMMA, compression molding, b) PMMA, compression molding, heparin-surface modified, c) acrylate/methacrylate copolymer; Class II: Silicone: a) Polydimethylsiloxane, b) Polydimethyldiphenylsiloxane; Class III: Hydrogel: a) poly-hydroxyethylmethacrylate (poly-HEMA), b) polyacrylate-hydrogel; Class IV: Thermoset polymer: methylmethacrylate, hydroxyethylmethacrylate, ethylene glycol dimethacrylate. Each IOL was placed in a rectangular transparent acrylic test chamber filled with balanced salt solution and subjected to irradiation from a Q-switched Nd:YAG laser. The laser beam was focused on the posterior surface and inside of the IOLs. The optic of the IOL was divided into four target zones and each zone was subjected to 40 bursts inside the...Continue Reading

Citations

Feb 22, 2012·PloS One·Bastiaan Kruijt, Thomas J T P van den Berg
Jan 19, 2012·Ophthalmic Surgery, Lasers & Imaging : the Official Journal of the International Society for Imaging in the Eye·Norman SaffraNick Mamalis
Jul 11, 2006·Journal of Biomedical Optics·Hee-Cheol KimNorbert A Hampp

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