Metamorphopsia
Metamorphosia is a type of visual distortion. Wavy lines or distortion in the center of the field of vision is called metamorphopsia. You should contact your doctor immediately if you suddenly develop metamorphosia, as they may be the sign of a serious condition. People with wet age-related macular degeneration may be advised to test themselves daily with an Amsler grid and report any abnormalities to their doctors.