INTRAOCULAR LENS WITH ACCOMMODATIVE PROPERTIES

摘要

This new intraocular lens consists of two parts. The posterior part or haptic part (12) is inserted behind the iris and in front of the natural lens or artificial implant (20). An anterior or optical part (10) is made of flexible material and is placed before the iris. Its diameter is variable but should be large enough to cover the pupillary margins to some degree under various conditions of natural dilation. The anterior (10) and posterior (12) part of the lens are separated by a compressible circular groove (16) in which the iris will settle. The diameter of this groove (16) is slightly larger than the pupillary diameter measured under normal photopic daylight conditions and for distance vision. Since the pupil becomes smaller in near vision, the iris will exert a slight pressure at the level of the groove (16) of the lens which will cause a progressive and evenly distributed flexing of the anterior part (10) of the intraocular lens, as the diameter of the compressible circular groove (16) slightly decreases. This flexing will induce an increase in refractive power.