Abstract

Metamorphopsia is a type of distorted vision in which a grid of straight lines appears wavy and parts of the grid may appear blank. People with this condition often first notice this when looking at mini-blinds in their home.

It is mainly associated with macular degeneration, particularly age-related macular degeneration with choroidal neovascularization. Other conditions that can present with complaints of metamorphopsia include pathological myopia, presumed ocular histoplasmosis syndrome, choroidal rupture and multifocal choroiditis.

Types

Dry (nonexudative, > 80%)—deposition of yellowish extracellular material in and between bruch membrane and retinal pigment epithelium (“drusen”) with gradual loss in vision.

Wet (exudative, 10–15%)—rapid loss of vision due to bleeding secondary to choroidal neovascularization.