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KMID : 1011420150200030285
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Journal of Korean Ophthalmic Optics Society
2015 Volume.20 No. 3 p.285 ~ p.291
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Development of Hyaluronic Acid-Functionalized Hydrogel Lens and Characterization of Physical Properties and Lysozyme Adsorption
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Lim Hwa-Lim
Kim Ho-Joong
Jun Jin
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Abstract
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Purpose: The hydrogel lenses have been functionalized with HA(Hyaluronic Acid) using two different methods: construction of an IPN(Interpenetrating Polymer Networks) and formation of CCB(Chemical Covalent Bonding). The lysozyme adsorption and physical properties such as optical transmittance and water content of the hydrogel lenses have been investigated in order to determine whether method is suitable for the application potentials in contact lens industry.
Methods: HA have been added to the hydrogel lenses prepared in the Lab using the two different method, e.g. IPN and CCB. The optical transmittance was measured in the wavelength range of 300~800 nm. The water content was measured by the gravimetric method using 0.9% NaCl saline solution. The amounts of adsorbed lysozyme on the contact lenses was analyzed by HPLC after incubation for 12h in artificial tears.
Results: The water content of the HA added hydrogel contact lenses was increased, and the lens made by IPN method showed higher water content than the lens made by CCB method. The optical transmittance was over 90% both before and after addition of HA. Comparing the lysozyme adsorption reduction ratio, contact lens manufactured by IPN method was 60.0%, and the lens made by CCB method was 40.4%.
Conclusions: CCB method is appropriate to distribute the functional material evenly throughout the lens, whereas IPN method is effective for the case of giving the functionality on the lens surface without phase separation.
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KEYWORD
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Contact lens, Hyaluronic acid, IPN, Chemical Covalent Bonding, Lysozyme adsorption, Water con-tents, Hydrogel
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