Vision changes may indicate a serious problem with the tissue that
lines the back of the eyeball (retina), optic nerve, or blood vessels in the
eye. See a picture of the
retina. Evaluation by a health professional is needed
for sudden vision changes, such as:
Flashes of light (photopsia). Photopsia is brief
but recurrent streaks, sparks, or flickers of light, particularly when you move
your eyes or head. The flashes of light may be easier to see when you look
toward a dark background. The brief flashes may occur with
Floaters, which are shadows or dark objects that float
across your visual field. Sudden development of floaters may be a sign of a
A dark curtain or veil
across part of your visual field. This may occur with retinal
Partial or complete vision loss in one or both eyes.
This may occur with retinal detachment.
How this information was developed to help you make better health decisions.