Pupil size abnormalities can sometimes signal disease. 1  Glaucoma: A mid-dilated pupil can be a sign of glaucoma.  Aneurysm: An aneurysm that pushes on certain blood vessels in the brain can cause a dilated pupil as well as other symptoms.
Quick Answer. The total lifespan of a lightning bug is anywhere from one to two years. However, the bulk of that lifespan is spent underground in the larval phase. Adult lightning bugs have very short life spans, averaging just two months in the wild. Continue Reading.
HOW IT WORKS. The Lightning Bugâ¢ is based upon the science of lightning. There are two components of lightning; the bright white flash everyone wants to capture and the unseen infrared light that always precedes it. The Lightning Bugâ¢ uses a high-speed photodiode sensor optimized to the infrared burst that occurs just before a lightning strike. This infrared light comes from the vaporization of air and particles in the air. The Lightning Bugâ¢ acts as a lookout for your camera, watching for a change in infrared light. When a significant change of infra-red light over a very short period of time is detected, it directs the camera shutter to trip and capture the lightning in action.