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Proceedings Paper

In-vivo measurements of the tear film on a cornea and a contact lens by use of interferometry
Author(s): Tomasz J. Licznerski; Henryk T. Kasprzak; Waldemar Kowalik
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Paper Abstract

The tear film fulfills several important functions in the eye. Apart of its physiologic functions like maintaining a moist environment for the epithelial cells of the cornea and conjunctiva, bacterial properties, transporting metabolic products etc., this film causes that the corneal surface has the optical quality. This smooth surface allows to apply interferometry for measurements. The paper presents tear's layer distribution on the soft contact lens and the cornea in comparison. Tv frame speed registration in the Twyman- Green interferometer was used to observe an unstable biomedical objects like the eye. The proposed method has the advantage of being noncontact and applies the low energy laser beam in interferometric set-up. This provides non- invasive testing of human cornea in vivo and enables observation the kinetics of its tear layer deterioration. The evaluation of non-invasive tear breakup time is possible by use of proposed setup. Further analysis of recorded interferograms helps to examine the matter of the breakup process and can be used for detection of the 'dry eye' symptoms.

Paper Details

Date Published: 5 December 1996
PDF: 5 pages
Proc. SPIE 2930, Lasers in Ophthalmology IV, (5 December 1996); doi: 10.1117/12.260868
Show Author Affiliations
Tomasz J. Licznerski, Technical Univ. of Wroclaw (Poland)
Henryk T. Kasprzak, Technical Univ. of Wroclaw (Poland)
Waldemar Kowalik, Technical Univ. of Wroclaw (Poland)


Published in SPIE Proceedings Vol. 2930:
Lasers in Ophthalmology IV
Reginald Birngruber; Adolf Friedrich Fercher; Philippe Sourdille, Editor(s)

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