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The paper presents preliminary results of applying two different interference techniques for evaluation of the breakup characteristics of the tear film. The Twyman-Green interferometer (TGI) and Lateral Shearing technique (LST) were applied in two separates set ups. To find irregularities in the tear film distribution, the sequence of interferograms of the cornea or contact lens were stored and processed in a computer by use of modular frame grabber. The interferograms of in vivo precorneal tear film breakup formation are presented for both techniques. The proposed methods have the advantage of being noncontact and applying the low energy laser beam.
Tomasz J. Licznerski,Henryk T. Kasprzak, andWaldemar Kowalik
"Two interference techniques for in-vivo assessment of the tear film stability on a cornea and contact lens", Proc. SPIE 3320, Tenth Polish-Czech-Slovak Optical Conference: Wave and Quantum Aspects of Contemporary Optics, (1 January 1998); https://doi.org/10.1117/12.301335
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Tomasz J. Licznerski, Henryk T. Kasprzak, Waldemar Kowalik, "Two interference techniques for in-vivo assessment of the tear film stability on a cornea and contact lens," Proc. SPIE 3320, Tenth Polish-Czech-Slovak Optical Conference: Wave and Quantum Aspects of Contemporary Optics, (1 January 1998); https://doi.org/10.1117/12.301335