Applications of Scheimpflug Imaging in Glaucoma Management: Current and Potential Applications

Figure 3

Diagramatic representation of the biomechanical response of the cornea to the metered air puff delivered by the Cornea Visual Scheimpflug Technology (Corvis ST). The first phase (left) is marked by corneal surface flattening and the initiation of an inward conformational change in the corneal curvature (referred to as the first applanation ). Further deformation produces a concave corneal surface. The moment it reaches the maximally deformed state (middle) is referred to as the time of highest concavity. The distance, , is the peak distance or corneal deformation amplitude. After reaching its maximally concave shape, the cornea recoils into its original shape. When the surface is similarly flattened compared to , this moment marks the second applanation or (right).