The Corvis® ST is the first device in clinical practice that provides a parameter for corneal stiffness.
Corneal stiffness is a term to describe the overall rigidity of the cornea – it is a measure of the resistance against elastic deformation as a response to the applied force. Bending stiffness can be calculated based on the applied force over displacement along the same direction as the force is transferred.
The stiffness parameter introduced by Cynthia Roberts has been proven to be important for both detection of keratoconus and for prediction of glaucoma progression.