inÂ·diÂ·caÂ·tion. The basis or rationale for using a particular treatment or diagnostic test; may be furnished by a knowledge of the cause (causal indication), by the symptoms present (symptomatic indication), or by the nature of the disease (specific indication). [L. fr. in-dico, pp.
This happens after a bright flash or by looking at a bright light by mistake. This has never happened until about a year ago. Update: The light is not like the blurred light you see after looking at a bright light. It is a semi-circular jagged line to the right which caused a loss of vision where it exists. It gradually expands and drifts to the right periphery disappearing after about 15 minutes. Update 2: Thanks - I don't know who is giving the thumbs down as all the answers are helpful!
When the vitreous separates from the retina, you may see flashing lights once in a while, for a few weeks. If you see jagged lines of light that last 10 to 20 minutes and happen in one or both eyes, this is probably a migraine caused by the spasm of blood vessels in the brain. If you don't develop a headache after, the light flashes are called ophthalmic migraine, or migraine without headache.