International Ophthalmology

, Volume 32, Issue 3, pp 229–233 | Cite as

Comparison of tear osmolarity and ocular comfort between daily disposable contact lenses: hilafilcon B hydrogel versus narafilcon A silicone hydrogel

  • Ozge Sarac
  • Canan Gurdal
  • Basak Bostancı-Ceran
  • Izzet Can
Original Paper


The aim of this study was to evaluate tear osmolarity and ocular comfort with two different types of hydrogel daily disposable lenses. The right eyes of 15 first-time contact lens users were included in this prospective study. All eyes wore hilafilcon B silicone hydrogel contact lenses for 8 h (group 1). After 1 week without contact lenses, all eyes wore narafilcon A silicone hydrogel contact lenses for 8 h (group 2). Tear osmolarity measurement was performed before and after 4 and 8 h of each contact lens wear. Ocular comfort was assessed after 4 and 8 h of each contact lens wear. In group 1, the mean baseline, 4- and 8-h tear osmolarity values were 293 ± 10.57, 303.00 ± 10.5 mOsm/L (p = 0.023), and 295.0 ± 1.4 mOsm/L (p > 0.05), respectively. In group 2, the mean baseline, 4- and 8-h tear osmolarity values were 294 ± 13.65, 300.9 ± 11.3 mOsm/L (p = 0.007), and 298.80 ± 7.2 mOsm/L (p > 0.05), respectively. In group 1, the mean comfort score was 7.20 ± 0.45 and 8.60 ± 0.45 at 4 and 8 h, respectively (p = 0.038). In group 2, the mean comfort score significantly decreased from 9.80 ± 0.45 to 7.80 ± 0.84 at 4 h (p = 0.039). Both hydrogel and silicone hydrogel daily disposable contact lenses elevated tear osmolarity during 8 h of contact lens wear. The increase in tear osmolarity with both contact lenses was below the cut-off value for dry eye and was not associated with ocular comfort.


Daily wear contact lenses Hydrogel Silicone hydrogel Tear osmolarity Ocular comfort 



None of the authors have any financial support. The study does not have any sponsor.

Conflict of Interest

None of the authors have any declarations of interest.


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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Ozge Sarac
    • 1
  • Canan Gurdal
    • 1
  • Basak Bostancı-Ceran
    • 1
  • Izzet Can
    • 2
  1. 1.2nd Department of OphthalmologyAnkara Ataturk Training and Research HospitalBilkent, AnkaraTurkey
  2. 2.Department of Ophthalmology, School of MedicineBozok UniversityYozgatTurkey

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