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KMID : 1159320150170040493
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Korean Journal of Vision Science
2015 Volume.17 No. 4 p.493 ~ p.501
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The Physical Properties of Contact Lenses included Wettability Monomer
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Jung Ji-Yeon
Lee Hyun-Mee
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Abstract
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Purpose: The physical properties of contact lens including MPC(2-methacryloyloxyethyl phosphorylcholine) and PEGMA(poly(ethyleneglycol)methacrylate) monomers were investigated.
Methods: Samples were polymerized by mixing 2-hydroxyethyl methacrylate (HEMA), with MPC, PEGMA, and Styrene. Eight types of polymerized contact lenses and one omafilcon A on market were prepared for the samples. To evaluate the physical properties of samples, water contents, refractive index, contact angle, and tensile strength were measured.
Results: The water contents of HMP had the highest value and HS had the lowest value. The refractive index of HS and HSP has high value, while HM and HMP has low. In the case of the tensile strength, omafilcon A had an extremely low value. In the case of the contact angle, HMP had the lowest value indicating high wettability, and HSMP had the highest value indicating low wettability.
Conclusion: When MPC and PEGMA were mixed together, the highest moisture content and the lowest contact angle could be obtained. It was found that MPC and PEGMA monomers could improve the wettability of hydrogel contact lenses.
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KEYWORD
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Contact lens, Hydrogel, Wettablility, Copolymer
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