Intraocular implant for correction of myopia

Abstract

An intraocular implant includes an optic part consisting of a central diverging lens of minus optical power, whose thickness increases radially from its optical center, and a peripheral edge shaped in the manner of a converging lens, and a haptic part for supporting the optic part, on each side of the latter, wherein the implant has the function of correcting myopia and is designed to be arranged in the anterior chamber of the eye, without ablation of the crystalline lens, the central diverging lens being a corrective lens, and the peripheral converging lens being a lens for focusing the peripheral light in front of the retina.

We claim: 
     
       1. An intraocular implant, comprising an optic part consisting essentially of a central diverging lens of minus optical power, whose thickness increases radially from its optical center, and a peripheral edge shaped in the manner of a converging lens, and a haptic part for supporting said optic part, on each side of the optic part, wherein said implant has the function of correcting myopia and is designed to be arranged in the anterior chamber of the eye, without ablation of the crystalline lens, the central diverging lens being a corrective lens, and the peripheral converging lens being a lens for focusing peripheral light in front of the retina, wherein, in combination, radial extension of the central diverging lens is limited by a circle with a .[.radius.]. .Iadd.diameter .Iaddend.of between 3.5 and 4.5 mm, radial extension of the peripheral converging lens is increased to a circle with a .[.radius.]. .Iadd.diameter .Iaddend.of between 4.8 and 6.5 mm, in order to cover the retina in dim light, and said peripheral converging lens has a plus power in a range between 20 and 60 diopters. 
     
     
       2. The implant as claimed in claim 1, wherein at least the central diverging lens is made of a material having a refractive index between 1.65 and 1.75. 
     
     
       3. The implant as claimed in claim 2, wherein said material is polysulfone.