I have invented an intraocular lens (IOL) coated with diamond-like carbon film and have investigated its physical properties. Diamond-like carbon film is an ultrathin film which is composed of many carbon atoms and very few hydrogen atoms, and has properties very similar to diamond. I have measured the following properties of the polymethylmethacrylate (PMMA) plates or IOLs coated with diamond-like carbon film: light transmission curve, resistance against Nd:YAG laser capsulotomy, peel-off test, and contact angle. The plates or lenses are more ultraviolet-absorbing than uncoated PMMA plates, and PMMA plates coated with 50 nm-thick diamond-like carbon film have a light transmission curve very similar to that of a 25-year-old human crystalline lens. The pits and cracks due to Nd:YAG laser emission were smaller in the coated IOLs were more hydrophobic and oleophilic than uncoated IOLs. Diamond-like carbon film coated IOLs are thought to be very promising.
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