In-vivo measurements of the tear film on a cornea and a contact lens by use of interferometry

Tomasz J. Licznerski; Henryk T. Kasprzak; Waldemar Kowalik

doi:10.1117/12.260868

5 December 1996 In-vivo measurements of the tear film on a cornea and a contact lens by use of interferometry

Tomasz J. Licznerski, Henryk T. Kasprzak, Waldemar Kowalik

Proceedings Volume 2930, Lasers in Ophthalmology IV; (1996) https://doi.org/10.1117/12.260868
Event: BiOS Europe '96, 1996, Vienna, Austria

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.

Citation Download Citation

Tomasz J. Licznerski, Henryk T. Kasprzak, and Waldemar Kowalik "In-vivo measurements of the tear film on a cornea and a contact lens by use of interferometry", Proc. SPIE 2930, Lasers in Ophthalmology IV, (5 December 1996); https://doi.org/10.1117/12.260868

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