What causes blurred vision and the sudden appearances of halos around lights?

Cornea swelling. Contact lens overwear, keeping eyes open too long in a pool, or other causes of swelling of the front of the eye can cause these symptoms. If pain and light sensitivity are also present, then an urgent visit to your eye doctor is needed!

Related Questions

How does anxiety cause occasional blurred vision, halos around lights, and eye strain?

Affects Eye Muscles. Anxiety raises the level of activation of the sympathetic nervous system (the "fight or flight" system). This prepares the person for anticipated danger. Vision needs to be very sensitive to light or movement, but the details don't matter as much when you are facing a tiger in the dark (for example). And fight or flight is not supposed to last, it is a strain over time. Read more...
Norepinephrine. anxiety=increased norepinephrine (adrenaline) the chemical messenger which speeds up the whole human system-BUT check in with an eye MD (ophthalmologist) for other causes. Read more...