[Experiences with secondary implantation of the Choyce Mark IX anterior chamber lens in unilateral aphakia].

Choyce Mark IX lenses were implanted in 72 patients between 71 and 86 years of age suffering from unilateral aphakia, who could not be helped with contact lenses; 38 of the patients were observed for a period of more than 16 months. The lenses were attached in the angle of the anterior chamber. None of the patients showed signs of the previously feared complications such as corneal decompensation, secondary glaucoma or iridocyclitis. The Choyce lens is ideally suited for secondary implantation. The operation is simple and post-operative reactions disappear in less than a week. The lens sits firmly in the eye; it cannot be dislodged against the endothelium of the cornea. The pupil is dilatable and its condition is unimportant. There is no contraindication for implantation in cases in which vitreous is present in the anterior chamber. The marked subjective improvement, which all the patients remarked on, is especially worth noting.