if my pupils dilate in the dark to let in more light in order to see more; why isn’t it really bright when they dilate while drunk?

555 views

[ad_1]

if my pupils dilate in the dark to let in more light in order to see more; why isn’t it really bright when they dilate while drunk?

In: Biology
[ad_2]

When drunk the pupils are slower to react to changes in light level. When light is flashed in the eyes to see if someone is drunk they are looking for a slow pupil response, not dilation.

Much of the seeing-in-the-dark effect is not due to pupil dilation but to an increase in your eye’s sensitivity to light. Your pupils can contract and dilate very quickly, like in a second or less, but the chemical adaptation takes up to twenty minutes to kick in fully, and several seconds to wear off in bright light.