Spoliation of a rigid gas permeable contact lens by sodium chloride: A free volume microprobe study.

Urs, M. V. Deepa and Ranganathaiah, C. (2009) Spoliation of a rigid gas permeable contact lens by sodium chloride: A free volume microprobe study. Physica Status Solidi C: Current Topics in Solid State Physics, 6 (11, Co). pp. 2411-2413. ISSN 1862-6351

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Official URL: http://dx.doi.org/10.1002/pssc.200982073


The interaction of one of the major inorg. ions present in tears, viz., sodium chloride (NaCl), with a rigid gas permeable contact lens, poly(fluorosilicone acrylate) (FP92) was investigated using Positron Annihilation Lifetime Spectroscopy (PLS) and refractive index measurement. The authors monitored the changes in its free vol. size and no. d. in the presence of NaCl solute trans-ported through diffusion. Based on PLS results, the authors propose that the adhesion of sodium chloride salt to the fluorine and methacrylate sites of FP92 results in zones of excess salt concn. The changes in refractive index of the contact lens material due to the salt adhesion, correlates well with the changes in free vol. of the material. Presence of sodium chloride perturbs the free vol. of the lens material and hence its polarizability. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim). [on SciFinder(R)]

Item Type: Article
Additional Information: Unmapped bibliographic data: PY - 2009/// [EPrints field already has value set] M3 - 10.1002/pssc.200982073 [Field not mapped to EPrints] JA - Phys. Status Solidi C [Field not mapped to EPrints]
Uncontrolled Keywords: polyfluorosilicone acrylate contact lens sodium chloride refractive index polarizability
Subjects: Physical Sciences > Physics
Divisions: PG Campuses > Manasagangotri, Mysore > Physics
Depositing User: Kodandarama
Date Deposited: 06 Jun 2013 06:10
Last Modified: 06 Jun 2013 06:10
URI: http://eprints.uni-mysore.ac.in/id/eprint/12099

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