Metamorphopsia


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 can first notice they suffer with the condition 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 —deposition of yellowish extracellular material in and between bruch membrane and retinal pigment epithelium with gradual loss in vision.
Wet —rapid loss of vision due to bleeding secondary to choroidal neovascularization.

Etymology

Gk, meta + morphe, form, opsis, sight