Distorted Vision (Metamorphopsia)
What causes it?
If distorted vision persists, think of the fovea. Its cones are being warped by submacular bleeding, edema, or scarring. The most common cause is subretinal bleeding in . Other causes are an aging vitreous, trauma, and inflammation.
Binocular distorted vision is much less common. It could be caused by binocular foveal lesions. Another source, particularly if the symptom is transient, is mischief in vision-related cerebral cortex. The cause is usually stroke or seizure from a mass lesion, although migraine can rarely do this, especially in children.
What to do?
For new onset monocular metamorphopsia, get a prompt ophthalmologic examination. If the cause if bleeding from age-related macular degeneration, laser photocoagulation can sometimes be performed to shut off further hemorrhage.
Binocular metamorphopsia demands prompt ophthalmologic or neurologic evaluation.