Lens implants (pseudophakoi) classified according to method of fixation.

LENS implants may be classified according to the position of the optical part (posterior chamber lens, anterior chamber lens, pupillary lens), the material used (acrylic, silicate glass, quartz, one-piece lens, two-material lens), and the method of fixation (Binkhorst, 1962a, b). As fixation is obtained by contact of the haptic part of the pseudophakos with the ocular tissues, the subsequent stability of the implant and the integrity of the ocular tissues depend on its design and function. Accounts of the work of surgeons mentioned below, with the exception of Brown and Fedorov, are given by Choyce (1964).