Abstract
AbstractAlthough the Scheimpflug principle was first described over a century ago, the clinical use of Scheimpflug camera in anterior segment imaging started only a decade ago. Scheimpflug imaging has since advanced significantly and modern instruments provide comprehensive imaging and topographic data of the anterior segment using a noncontact method. It provides anterior and posterior surface topography of the cornea that is derived from true elevation measurements. Approximately 25 000 data points are used to calculate topographic corneal thickness, corneal curvature, anterior chamber angle, volume, and height. Pachymetry and topography of the entire anterior and posterior surface of the cornea from limbus to limbus are calculated and displayed. Keratoconus detection maps may be generated to assist in the classification and diagnosis of keratoconus prior to contact lens fitting or refractive surgery. Zernike wavefront representation of the anterior and posterior surface of the cornea may be calculated based on the measured height data. In this presentation the clinical applications and limitations of Scheimpflug imaging will also be discussed.
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