The dilator muscle which makes the pupil larger and the constrictor muscle which makes the pupil smaller.
a group of smooth muscles called sphincter pupillae cause the pupil constriction which is known as mydriasis.
for the illegal drugs: the withdrawal of opioids such as morphine is known to cause mydriasis.
No, in animals even casuse mydriasis
depend on the cause of the mydriasis. if it is a dysfunction of the cranial nerve number three it won't go unless treated. another cause is withdrawal from opioids and it is go on it's own.
Macular degeneration itself does not directly cause mydriasis (dilated pupils). Mydriasis can result from various factors, including medications, neurological conditions, or eye trauma, but it is not a typical symptom of macular degeneration. Macular degeneration primarily affects central vision and the retina, leading to vision loss rather than changes in pupil size. If someone experiences mydriasis, it's important to consult a healthcare professional to determine the underlying cause.
dilation of the pupil.
Sympathetic stimulation of the eye will cause dilation of the pupil (mydriasis) and relaxation of the ciliary muscle for far vision.
Dilation of the pupils (Mydriasis)
Miotic agents cause the pupil of the eye to constrict, or become smaller. Mydriasis is the opposite, making the pupil dilate like when you go to the eye doctor.
Lactic acid settling in the muscles
All muscles cause movement due to the contraction of coupled muscle cells. Perhaps the question intended to inquire about muscles that cause a bending in which the joint angle decreases. Muscles of this type are called flexor muscles (biceps for example).
the parasympathetic fibers of the cranial nerve number three.