[Soft intraocular lenses]

Hard intraocular polymethylmethacrylate (PMMA)-lenses have been implanted following cataract extractions since 1949, and their good properties are well proven. Soft intraocular lenses have only been implanted since 1976. Their chemical and physical properties, advantages and disadvantages are discussed with reference to the well known PMMA-lenses. In the short term the patients obtain the same visual acuity with soft intraocular lenses as with hard intraocular lenses, and it is the impression, that the soft lenses are more tissue compatible, but more prolonged follow up is required.