Pupils dilate (get larger) when room light is dimmed. Pupils are round and equal in size, in both bright and dim light. Pupils quickly andsymmetrically constrictto a bright light directed into either of the eyes and when the bright light swings between the two eyes. Is it normal for pupi...
The size of your pupils and how they react to light can help diagnose certain health problems. For instance, if you’ve had a blow to the head and one or both of your pupils are dilated -- larger than normal -- that can be a sign of a seriousbraininjury. Your doctor also can use...
Pupil dilationcan be a normal reaction to low light or emotion. When not part of a normal pupil response, pupil dilation can be caused by drugs, medications, poisons, brain injury, or disease. What can cause your pupils to dilate? In addition to being a normal response to low light, pup...
Adie's pupilA pupil in which the reactions to light, direct or consensual, are almost abolished, with a reaction occurring only after prolonged exposure to light or dark. The reaction of the pupil to a near target is also delayed and slow. The condition is usually unilateral, with the affec...
Illegal drug use, including the use of cocaine, amphetamines, LSD and ecstasy, can cause dilated pupils and slow down their reaction to light. Congenital aniridia One can be born with congenital aniridia, a rare condition usually affecting both eyes. The iris is partially or completely absent ...
This chapter provides a framework for understanding the afferent input from the retina which gives rise to the pupil light reflex, its integration within the midbrain, and its output which controls pupil size to each eye. The key features of the near reflex, which involves the coordination withi...
On the other hand, cuteness has been differentiated from attractive- ness and beauty14,15, and different visual responses to cuteness have been shown even in response to the same image3,14. By using the pupillary response as an unconscious physical reaction, we may clarify the ...
When you are outside on a cold day, your skin is much paler than normal. Later, you enter a warm room and your face becomes flushed. What are the reasons for these changes in color? What is the type of reflex that occurs due to painful stimuli?Explore...
Why do the pupils in my eyes change size? I find my sometimes my pupils change their sizes. What causes it? Is it normal? In Eye Health -Asked by : b1wdancer23 -3 answers -11/27/2012 Related Topics : eye health Most popular qustions: What to do and not to do with contact le...
In normal conditions, the pupils change size to let in the right amount of light. In the dark, they open wider or dilate to let in more light; in bright light,