Abstract: The invention relates to an implant made of a polysulfone plastics material and designed to be implanted between the layers of the cornea to correct eyesight defects. The implant can as act as a substitute for conventional spectacles and can additionally strengthen and shape the cornea to assist in treating corneal astigmatism and conical cornea.

Abstract: An intra-ocular lens which is formed entirely of a polysulfone plastics material. This material is capable of being worked to produce a lens of optical quality, has a refractive index in excess of 1.55 and is capable of being autoclaved in steam at a temperature in excess of 110.degree. C.

Abstract: The invention relates to anterior chamber implants of the type having a haptic with feet resting on the anterior surface of the iris. To enable the implant to be autoclaved, the optic is made of glass and the haptic is separately formed from an autoclavable inert material. Titanium and a polyethersulphone thermoplastic material are disclosed as suitable materials for the haptic.

Abstract: An intraocular anterior chamber implant which can be used successfully in widths of 5 mm or less comprises an optic and a haptic which consists of a pair of bridging members each of which joins one of diametrically opposed edges of the optic to a support member. The support members each have a scalloped edge, whereby a pair of co-planar "U" shaped support surfaces is provided, and each bridging member has scalloped side edges to reduce its width relative to the optic.