Hoya Corporation

Grieshaber & Co Ag Schaffhausen

Kazuaki Kadonosono

Hans Rudolf Grieshaber

Hideyuki Futamura

Hideyuki C/O Hoya Corporation Futamura

An object of the present invention is to provide a contact lens for vitreous surgery that is highly durable to washing, disinfectants, sterilizing high-pressure steam, and the like, and that has good antireflection effect in the visible light range. In the contact lensfor vitreous surgery used to observe the ocular fundusduring vitreous surgery, an antireflection filmproduced by ion beam sputtering is coated onto the upper surfaceof a lens main body, and the antireflection film is a multilayered film in which a high refractive index layerthat contains tantalum pentoxide (TaO) and a low refractive index layerthat contains silicon dioxide (SiO) are alternatingly layered.

Lens for intraocular observation and contact lens for vitreous surgery

An iris retractor for use in ophthalmic surgery, includes an elongated body portion for insertion through an incision in the eye to retract the iris, with the body portion including two parallel shafts secured to each other along a common longitudinal edge wherein each shaft has at least one end formed with a hook-shaped member. The shafts of the body portion are so joined together that the hook-shaped members diverge from the longitudinal edge downward at an angle to one another to exhibit a .LAMBDA.-shaped configuration, and exhibit parallel shanks which are spaced from each other at a distance, the dimension of which depends on the angle between the hook-shaped members.

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Yokohama, Japan

Kazuaki Kadonosono