One cause of significant anisometropia and subsequent aniseikonia has been aphakia. Aphakic patients do not have a crystalline lens. The crystalline lens is often removed because of opacities called cataracts.
Aphakia, a condition characterized by the absence of a crystalline lens in the eye, is a significant cause of anisometropia and aniseikonia. Cataracts, opacities that affect the lens, are frequently removed due to their presence.