| abstract |
A contact lens for vitreous operation that is highly durable to washing, various disinfectants, sterilizing high-pressure steam, etc., and that in visible light region, exerts an excellent antireflection effect. There is provided contact lens (10) for vitreous operation for use to observe the ocular fundus (3) at vitreous operation, characterized in that lens body (11) at its upper surface (13) is coated with antireflection film (14) by ion beam sputtering technique, the antireflection film being a multilayer film composed of, alternately superimposed, high refractive index layers (18) of tantalum pentoxide (Ta2O5) and low refractive index layers (19) of silicon dioxide (SiO2). |