Pupils dilate when there's not enough light in the room or area you're in. They dilate to let in as much light as possible so you can see as well as you can in the dark. When outside and it's bright, your pupils get smaller because there is too much light. ~
~Imadork881 changed to Sleenky ^.^
An agent that causes the pupil to dilate is called a mydriatic. Mydriatics are commonly found in eye drops and in some prescription anti-anxiety medications.
ectacy
darkness,
atropine
dilates them
No. It actually dilates them. Opiates (hydrocodone, heroin etc) constrict pupils.
The same as ours do... light constricts (smaller), darkness dilates (larger) the pupil.
When there is insufficient lights. Pupil will dilates so as to see better in dim light.
The part of the eye that dilates is known as the pupil. It sometimes dilates when you look at someone that you are physically attracted to. This happens because of a chemical reaction in your brain. Pupils also dilate according to how much light is present to allow better vision. Pupils are dilated when there is little light available. You can test this out by looking in a mirror where there is a lot of light (your pupils should be very small because allowing too much light in damages the eyes). Then look into a mirror where there is less light and your pupils will have dilated. During a concussion, a person may also have dilated pupils. I'm not sure why, but probably as a result due to the force of impact sustained by the head.
The pupils' size change in response to the degree of light that is entering the. Dilation depends less on the distance of the object from the eye and more on how many light rays are in the field of vision.
If taken orally, the drug will just dilate your pupils very much. If taken through the nostril in a crushed form, it may cause your eyes to water, redden, and will dilate them even more because the ecstasy hits the bloodstream near your eyes quicker this way.
Alcohol dilates peripheral blood vessels, but has been known to actuallyconstrict some blood vessels in the brain, lowering the oxygen content.
Dilate means "to become wider."For example:His pupils dilated when he saw her.The cervix dilates prior to giving birth so that the fetus can transit the vagina.
Dilate means "to become wider."For example:His pupils dilated when he saw her.The cervix dilates prior to giving birth so that the fetus can transit the vagina.
Nitrate
The opposite of dilated pupils is constricted pupils.