April 2009
Volume 50, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2009
Tear Film Breakup in Dynamic Infrared Photorefraction (DIP)
L. Shi; B. Tan; Y.-L. Chen; J. W. L. Lewis; M. Wang
Author Affiliations & Notes
  • L. Shi
    Center for Laser Applications, University of Tennessee Space Institute, Tullahoma, Tennessee
  • B. Tan
    Center for Laser Applications, University of Tennessee Space Institute, Tullahoma, Tennessee
  • Y.-L. Chen
    Center for Laser Applications, University of Tennessee Space Institute, Tullahoma, Tennessee
  • J. W. L. Lewis
    E-Vision Technologies Inc., Tullahoma, Tennessee
  • M. Wang
    Wang Vision Institute, Nashville, Tennessee
  • Footnotes
    Commercial Relationships  L. Shi, None; B. Tan, None; Y.-L. Chen, None; J.W.L. Lewis, E-Vision, I; M. Wang, E-Vision, I.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science April 2009, Vol.50, 1581. doi:
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      L. Shi, B. Tan, Y.-L. Chen, J. W. L. Lewis, M. Wang; Tear Film Breakup in Dynamic Infrared Photorefraction (DIP). Invest. Ophthalmol. Vis. Sci. 2009;50(13):1581.

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Abstract

Purpose: : In the past 2 years, we have demonstrated that DIP is a cost effective method for keratoconus screening. Similar to retinoscopy, the retinal reflex carries information of both low- and high-order aberrations that can be detected and analyzed using Zernike analysis. This study examines the influence of tear film breakup on the results of the analysis.

Methods: : The multi-meridian and -eccentricity DIP technique is employed to image the same eyes both with and without film breakup. For each set of measured data, the pupillary reflex images are obtained and rotated to the corresponding detection meridians. Excluding the cornea reflection, the reflex images are rescaled to their maximum and minimum intensity and then decomposed into Zernike components to the 6th order. The percentage contribution from each aberration order is calculated and compared in the 2 groups.Result &

Keywords: aberrations • detection • keratoconus 
© 2009, The Association for Research in Vision and Ophthalmology, Inc., all rights reserved. Permission to republish any abstract or part of an abstract in any form must be obtained in writing from the ARVO Office prior to publication.
Copyright © 2025 Association for Research in Vision and Ophthalmology.
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