Computerised Videokeratography or ‘CVK’ Corneal topography or computerized videokeratography (CVK) is a non-invasive medical imaging technique for accurately measuring the thickness, contour and shape of the cornea. The cornea is the transparent, dome-shaped window at the front of the eye. the topography using the Pentacam device employs a rotating camera to take a full 360-degree image of the front of the eye.

Topography is used to diagnose and monitor the progression of corneal conditions such as Keratoconus and to take accurate measurements of corneal shape prior to and after refractive surgery and corneal transplantation.