It takes seconds after exposure to headlight glare for the pupil to adapt once again to dark conditions. seven five three nine

It takes seven seconds for the pupil to adapt once again to dark conditions after getting exposed to headlight glare.

The pupil of the eye refers to the black circle at the midpoint of the iris. The pupil functions mainly to monitor the amount of light getting inside the eyes, to make sure that to much light does not blanch out the visions in extremely bright light conditions, and to capture as much light as possible in dim light conditions.