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There are many things that can dilate the pupil of the eye. First of all, light plays a huge factor. Also, if there are unknown, alien substances in your body, such as drugs, that is also a pupil dilator. Also, if you have recently suffered a concussion, your pupils might be dilated for a while. Pupils also dilate when focusing on different planes of vision, as well as different distances.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoA dilated pupil is one that is larger than usual. In contrast, a constricted pupil is one that is smaller than usual.
Wiki User
∙ 13y agoThe pupil is expected to be dilated under the circumstances of:
1. Dim light
2. Observing distant objects
Wiki User
∙ 13y agobright lights
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Which part of the eyes control size of the pupil?
the part of the eye that controls the pupil is the iris
Why does astigmatism affect your night vision?
At night, the pupil dilates to let in more light. Astigmatism is a distortion in the cornea that causes different focal lengths for light passing through different parts of the cornea into the lens. With a small aperture (constricted pupil), the differences do not cause noticeable blurring; just as in a camera, a small aperture gives greater depth of field. At night, when the aperture is larger (dilated pupil), the eye has less depth of field, so the imprecise focal length of the eye causes the image to be noticeably blurred.
The opening through which light enters the eye?
The pupil allows light to enter the eye.
In which part of the eyeball does light rays enter?
the pupil =]
The opening in the center of the iris?
The small opening of the iris in the eye is the pupil.
A young woman is brought to the emergency room with extremely dilated pupils Her friends say that she has overdosed on cocaine What cranial nerve is stimulated by this drug?
maybe the oculomotor nerve is affected( whIcH we alreadY kNown thaT tHe fUnctiON of oculomotor nerve is a mOtor to mOve the eyebAll aNd parasyMpathetic nerve fiber tO cOstriCt tHe pupil) and if thIs nerVe was erruPted,the pUpil will be dilaTed or extremeLy dilated
Why pupil dilated when you are frightened?
The better to see that which is frightening you. In emergency situations, you want to be as well informed as possible.
What does dilacid means?
Dilacid is not a word. Dilated means how much the cervix (or womb) has opened. Dilated pupil means that there is a disease of the eye, which is basically caused by slimming down of the dilator muscle of the iris.
How can you use dilation in everyday life?
When an architect makes blueprints for a house those blueprints are later dilated by construction workers. When someone is constantly itching their eye their pupil gets dilated. Hope that helps! :)
What does blown pupil indicate?
A blown pupil usually refers to a pupil that is completely dilated and no longer responding to light. A blown pupil (also called 'fixed and dilated') is when one or both of the pupils are large and do not respond (constrict) to light. Possible causes may include trauma to the eye, brain injury, pressure or trauma to the optic nerve. Often used in medical drama shows when diagnosing someone who has no brain activity - basically brain dead, but the two are not inextricably inked.
What do fixed and dilated pupils mean?
fixed pupil- n. A pupil that is unresponsive to stimuli.
Which part of the eyes control size of the pupil?
the part of the eye that controls the pupil is the iris
If your pupils are dilated from using meth can drinking alcohol reduce pupil dilation?
Yes but it isn't healthy...try an opiate...such as hydrocodone (norcos)
What is the medical term for contraction of the pupil?
The phrase that means that someone's pupils contract when a bright light is shone into their eyes is "pupils reactive" ... they react to the light. If they don't react to the light, they'd be described as "pupils fixed and dilated."
Can a child on Ritalin have constricted pupils?
I am an adult and I started to take Ritalin 4 days ago. Usually I have dilated pupil, but with Ritalin they are quite constricted. I looked around in my text books and it is supposed to be the opposite to pupil are supposed to be more dilated. I also took effexor last month and my pupils were extra dilated (almost completely black). Yep I am not a professional, but it is very strange. Nevertheless even if with Ritalin my pupils are constricted my eye are very sensitive to light. My own theory will be that in some person Ritalin will increase the eye sensibility to light and than limit the amount by closing the pupil. Makes sense for me but I will still look around.
You would expect the pupil to be dilated in which circumstances?
It either means you're on drugs or you are attracted to that person
What does it mean to have one dilated eye pupil and one normal eye pupil?
This can be a sign of a serious neurologic disease and, if noted in a pet or a person, should be seen by either a vet (for the pet) or a doctor (for a person). Eyesight is actually somewhat shared between the two eyes, so the pupils dilate and constrict together. To have one eye dilated and one constricted or normal, the neural connection between the two eyes would have to be damaged or destroyed.
