is there any new floaters in the vision? what do you mean blurried reaction ?
from what I gather, you have flasing lights and a hazy curtain. The back of the eyeball is full of a gel called vitreous. This gel is intimately attached to the retina and as we age, this gel liquifies, shrinks and pulls away from the retina. The separation of the gel from the retina causes flashes of light to be seen, often off to the side in an arc pattern. If there is a weak spot in your retina, the gel may cause a tear to be formed. Given your extreme nearsightedness, I am concerned you may have a torn retina. You should be examined within 12-24 hours by an ophthalmologist. Hope this helps.