Corrects the curve at the vertical edges of a monitors display.

Inward bowing of image edges due to lens distortion. Image is squeezed in the middle.

a form of visual distortion that occurs when a flat image is projected onto a curved surface. Monitor raster circuits are designed to compensate for the distortion.

An inward bowing hour glass shape of the video image. All monitors experience slight pincushion distortion. The manufacturer gives guidelines on the specifications for each model. The pincushion changes according to resolution and also according to the size of the image.

A distortion of the image shape characterized by concave edges.