17 May 1996 Excimer laser-induced photochemical modification of contact lens material for tear affinity
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Abstract
Polymethyl methacrylate (PMMA) surface was photochemically modified in open air by using an ArF excimer laser and an ammonia-water solution. Photo-excited C-H bonds of the surface were effectively dehydrogenated with hydrogen atoms which were photodissociated from the ammonia-water solution. The dangling bonds of the dehydrogenated carbon atoms were combined with the NH2 and OH radicals which were also photodissociated. Thus, the sample surface showed hydrophilic property only on the photomodified parts. Based on the photomodification technique, a commercial hard-contact lens was also photomodified for tear affinity.
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Yoko Inoue, Masayuki Okoshi, Koichi Toyoda, Masataka M. Murahara, "Excimer laser-induced photochemical modification of contact lens material for tear affinity", Proc. SPIE 2673, Ophthalmic Technologies VI, (17 May 1996); doi: 10.1117/12.240058; https://doi.org/10.1117/12.240058
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