What is the name of the distortion affecting image shape when wearing high plus lenses?

The distortion affecting image shape when wearing high plus lenses is known as Pincushion Distortion. This type of distortion occurs because high plus lenses can magnify images significantly, leading to a visual effect where straight lines appear to bulge inward or have a pinched appearance. This phenomenon is particularly noticeable with high plus prescriptions due to the curvature and thickness of the lenses, which can cause the peripheral images to distort more than those in the center.

In contrast, Barrel Distortion typically results in an outward bulge of the image edges, which is more commonly associated with low minus lenses. Curvilinear Distortion can occur in some lens designs, especially with wide-angle views in photography, but it does not directly describe the specific impact of high plus lenses. Wavefront Distortion is related to the optical quality of the lens and is generally not referred to in the context of standard geometric distortion caused by plus lenses.