Contact Lens & Anterior Eye
Volume 34, Issue 1 , Pages 2-6 , February 2011

Void volume variations in contact lens polymers

  • P. Sane

      Affiliations

    • Department of Applied Physics, Aalto University, Otakaari 1M, 02150 Espoo, Finland
    • Corresponding Author InformationCorresponding author. Tel.: +358 947023145.
    • ,
  • F. Tuomisto

      Affiliations

    • Department of Applied Physics, Aalto University, Otakaari 1M, 02150 Espoo, Finland
    • ,
  • J.M. Holopainen

      Affiliations

    • Helsinki Eye Lab, Department of Ophthalmology, University of Helsinki, Finland

References 

  1. Jean YC, Mallon PE, Schrader DM. Principles and applications of positron & positronium chemistry. World Scientific; 2003;
  2. Sane P, Salonen E, Falck E, Repakova J, Tuomisto F, Holopainen JM, et al. Probing biomembranes with positrons. Journal of Physical Chemistry B. 2009;113:1810–1812
  3. Sane P, Tuomisto F, Wiedmer Susanne K, Nyman T, Vattulainen I, Holopainen Juha M. Temperature-induced structural transition in situ in porcine lens-changes observed in void size distribution. Biochimica et Biophysica Acta (BBA) – Biomembranes. 2010;1798(5):958–965
  4. Singh JJ, Eftekhari A, Upchurch BT, Burns KS. An investigation on microstructural characteristics of contact lens polymers. NASA technical paper; 1990. p. 3034
  5. Deepa MV, Ranganathaiah C. Influence of spoliation in poly(2-hydroxyethylmethacrylate) soft contact lens on its free volume and optical transparency. Journal of Materials Science: Materials in Medicine. 2007;
  6. Eldrup M, Lightbody D, Sherwood JN. The temperature dependence of positron lifetimes in solid pivalic acid. Chemistry and Physics. 1981;63:51–58
  7. Nakanishi H. In:  Sharma SC editors. Proceedings for the international conference on positron annihilation in fluids, Arlington, TX. Singapore: World Scientific Publishing; 1987;
  8. Sane P, Kilpeläinen S, Tuomisto F. 4-Channel digital positron lifetime spectrometer for studying biological samples. Materials Science Forum. 2009;607:254–256
  9. Olsen JV, Kirkegaard P, Pedersen NJ, Eldrup M. Palsfit: a new program for the evaluation of positron lifetime spectra. Physica Status Solidi C. 2007;4:4004–4006
  10. Shukla A, Peter M, Hoffman L. Analysis of positron lifetime spectra using quantified maximum entropy and a general linear filter. Nuclear Instruments and Methods in Physics Research A. 1993;335:310–317
  11. Mogensen OE. Positron annihilation in chemistry. Heidelberg: Springer-Verlag; 1995;
  12. Fornasiero F, Krull F, Prausnitz JM, Radke CJ. Steady-state diffusion of water through soft-contact-lens materials. Biomaterials. 2005;26(28):5704–5716

PII: S1367-0484(10)00080-9

doi: 10.1016/j.clae.2010.06.008

Contact Lens & Anterior Eye
Volume 34, Issue 1 , Pages 2-6 , February 2011

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