Excimer laser-induced photochemical modification of contact lens material for tear affinity

Yoko Inoue; Masayuki Okoshi; Koichi Toyoda; Masataka M. Murahara

doi:10.1117/12.240058

17 May 1996 Excimer laser-induced photochemical modification of contact lens material for tear affinity

Yoko Inoue, Masayuki Okoshi, Koichi Toyoda, Masataka M. Murahara

Proceedings Volume 2673, Ophthalmic Technologies VI; (1996) https://doi.org/10.1117/12.240058
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Yoko Inoue, Masayuki Okoshi, Koichi Toyoda, and Masataka M. Murahara "Excimer laser-induced photochemical modification of contact lens material for tear affinity", Proc. SPIE 2673, Ophthalmic Technologies VI, (17 May 1996); https://doi.org/10.1117/12.240058

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