Aniseikonic is a technical term used to describe visual distortions in which objects appear unequal in size. This condition can be caused by a number of factors, including optical aberrations, irregularities in the cornea or lens, or asymmetrical ocular shape. There are several synonyms for the term "aniseikonic," which are often used interchangeably in the field of optometry and ophthalmology. These include "anisometropia," "anisoconia," "anisometropic magnification," "anisotropic magnification," and "anisometropic amblyopia." Regardless of the terminology used, the condition can have significant impacts on visual function and quality of life, and may require corrective intervention to improve vision.