[Precalculated artificial lenses in ametropia (author's transl)]

The main sources of error in a successful precalculated artificial lens implantation in ametropia are inaccurate ultrasound measurements, inadequate calculation procedures, rules, suggestions and confidence in the accuracy of Knapp's law. In ametropia of -6.0 D to +4.0 D a precalculated lens implantation according to our three principles (uncorrected good vision, compatible aniseikonia, large retinal images) results in good vision with one and/or two artificial intraocular lenses.