The development of flexible, gas permeable, contact lenses, has permitted their introduction into clinical practice for the long term correction of aphakia. This study groups together the cases reported, by ophthalmologists in the area of Grenoble. Statistical analysis of the results have allowed us to establish a protocol and to define the place of this technique among already existing methods for the correction of the aphakic eye. The follow up was 20 months. There was non preoperative selection in our choice of patients for implantation, which probably explains the 10% failure rate. The protocol is described in detail based on our first 222 results.