Why does it seem to get darker?!


Question: Why does it seem to get darker?
Usually at night I stare off to my wall or some little area in my room with the lights off as i try to sleep. If I continue to stare and not blink, turn away, etc, it seems to get even darker as in the lighting seems to dim little by little. As i do so, i get curious as to why does it does that. What are my eyes doing so that it happens, is it bad for your eyes?

Answers:

That happens to everyone. Your eyes are focusing way too much since you're looking at that ONE direction, and things seem to get darker to make the focus level at what you're starring at higher.
(Kinda like in pictures where the main object is there and the rest/background is blurry).
This usually happens in the dark because your pupils are dilated.




The consumer health information on answer-health.com is for informational purposes only and is not a substitute for medical advice or treatment for any medical conditions.
The answer content post by the user, if contains the copyright content please contact us, we will immediately remove it.
Copyright © 2007-2011 answer-health.com -   Terms of Use -   Contact us

Health Categories