Inclusion Criteria:  age-related bilateral cataract age 21 or older visual acuity > 0.05 axial length: 22.0 - 26.0 mm normal findings in the medical history and physical examination unless the investigator considers an abnormality to be clinically irrelevant written informed consent prior to surgery  Exclusion Criteria:  active ocular disease (e.g. chronic severe uveitis, proliferative diabetic retinopathy, chronic glaucoma not responsive to medication) relevant othe rophthalmic diseases such as pseudoexfoliation syndrome (PEX), intraoperative floppy iris syndrome (IFIS) corneal decompensation or corneal endothelial cell insufficiency previous ocular surgery or trauma persons who are pregnant or nursing (pregnancy test will be taken in women of reproductive age) corneal astigmatism > 1 dpt. retinopathies