Corneal imaging with slit‐scanning and Scheimpflug imaging techniques

Abstract

Modern anterior segment imaging techniques, such as slit‐scanning and Scheimpflug imaging, greatly improved the field of corneal imaging. Devices such as the Orbscan (Bausch & Lomb Surgical, Inc) and, more recently, the Pentacam (Oculus, Inc) and the Galilei (Ziemer Ophthalmic Systems AG) have brought a whole new range of clinical possibilities and sparked interest in the academic community. These new tomographers create three‐dimensional models of the cornea and enable the direct measurement of both the anterior and posterior surface elevations. In this paper, we present a review of some available literature on those systems, regarding their optical principles and their performance in current clinical applications.

Key words:

• corneal imaging
• keratoconus
• keratorefractive surgery
• rotating Scheimpflug tomography
• slit‐scanning tomography system