Long-term follow-up of intraocular lens implants: the first 127 compared with the latest 100 of the same style in a span of 9 years.

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Abstract
The long-term follow up of the first 127 patients (127 eyes) treated by 1 surgeon with cataract extraction and Federov I lens implantation is reported. The proportion of patients achieving visual acuity of 6/12 or better had decreased since the 1 yr follow-up. Corneal edema was the most serious long-term complication. This group of patients is compared with the latest 100 patients (100 eyes) operated on by the same surgeon using the same type of implant. There was a reduction of some operative complications and improvement in surgical techniques had resulted in a lower sample endothelial cell loss at 1 mo.