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UV-block effect of functional additive with sterilization condition
Purpose : UV-block effect of soft contact lens polymerized and with 2,4-dihydroxybenzophenone in the basic hydrogel contact lens material was evaluated. and also the influence of sterilization condition on change of optical properties was analyzed. Methods: 2,4-dihydroxybenzophenone as additive with 2-hydroxyethyl methacrylate and the initiator AIBN were used for thermal copolymerization. The mixture was heated at 100 ℃ for 50 mins to produce the hydrogel contact lens. and they are heated at 115 ℃ for 3 hour for sterilization. Results: The optical properties of produced contact lens including 2,4-dihydroxybenzophenone showed that the UV-A transmittance was 28~36% and the UV-B transmittance was 10~18%. and Also, in case of sterilization situation, the results showed that the UV-A transmittance was 5~17% and the UV-B transmittance was 4~16%, respectively. Conclusions: After sterilization of produced contact lens, UV-block effect of soft contact lens including benzophenone group was increased.
