... has anyone else ever heard of this?
... lay on your back, close your eyes, take an ice cube and place it in the middle of the forehead until it melts ... in about 10 minutes your vision will be blurred and in about 15 minutes all you'll be able to see is faint gray/white images/shadows ...
... then place a warm washcloth over where the ice-cube was and within 5 minutes you'll have "temporary" night vision ... able to make out clear objects in a completely dark room ... lasts about 2-3 minutes ...
... pretty neat stuff ...