[Secondary cataract and IOL type and the shape of its optic part]

Although cortical remains are purged from the capsule sac by special techniques and better IOL models are used for implantation, opacification of the posterior capsule (OPC) persists to be one of the most frequent complications in modern cataract surgery. The frequency rate of OPC depends on used evaluation criteria. A total of 165 eyes were examined after cataract extraction for OPC. Four types of IOL were used; they are hydrophobic acryl three-part IOL (AcrySof MAZOVA, n = 46), hydrophobic acryl all-in-one IOL (ArySofSA30AL, n = 38) and silicone three-part (CeeOn911A, Pharmacia, n = 42). OPC were evaluated by EPCO 2000 computer soft. When IOL with the straight edge of the optic axis were in use (both silicone and acryl ones), there was registered, in 1 year after surgery (p < or = 0.05) a reliably lower frequency and intensity of OPC versus IOL with the curved edge of the optic axis. The shaped curvature in the posterior capsule encompassing tightly the IOL edge prevented further migration of lens cells. The IOL material (hydrophobic acryl or silicone) is of no importance for the OPC development. There was no reduction in visual acuity and no laser capsulotomy was made in any of the groups of patients.