Corneal topography

Corneal topography involves scanning the cornea on special devices such as Orbscan, Oculyzer or Pentacam. This scan provides very precise parameters that describe how the cornea is built, i.e. what its curvature is, its thickness at every point, what the elevations of its anterior and posterior surfaces are, ... The scan produces records in the form of maps on which the numerical data of the stated parameters are given.

Corneal topography is a basic procedure in the preoperative preparation and evaluation of candidates for laser removal of dioptre, as well as in the postoperative monitoring of the effects of the performed treatment. In addition, it is important in the diagnosis and monitoring of the effects of treatment of corneal diseases, such as keratoconus.

Of particular importance on the obtained scans are: the sagittal map (shows the curvature of the cornea at every point, expressed in dioptres), the anterior and posterior elevation maps, the pachymetry map (shows the thickness of the cornea at every point, expressed in microns), the keratoconus curve, …