Some external causes such as trauma or surgery to the eye, and some internal causes such as an unknown virus, an inflammatory condition, or a familial tendency have been suggested.
It came from the Adies mosquito.
The pupil is allways black. The iris is the colored part.
the light that gets into it
touching urself at night
dilating
The iris is like a contractile structure of smooth muscles which surround the pupil. The sphincter pupillae, one of the smooth muscles categories of the eye, causes constriction of the pupil. The dillator pupillae, the other category of smooth muscles of the eys, causes the pupil to dilate.
The pupil dilates when stimulated by the pinching on the nape of the neck.
The pupil size is controlled by the iris muscles. In bright light, the iris constricts the pupil to reduce the amount of light entering the eye. In dim light, the iris dilates the pupil to allow more light to enter. Emotional responses or changes in focus can also affect pupil size.
Possible causes of a dog's red pupil could include inflammation, infection, trauma, or underlying health conditions such as glaucoma or cataracts. It is important to consult a veterinarian for proper diagnosis and treatment.
Pupil's The pupil's mother came to school.
Administration of a miotic agent causes constriction of the pupil. Miotic agents work by stimulating the muscles in the iris to contract, resulting in a smaller pupil size. This can be useful in treating conditions such as glaucoma or to help improve vision after cataract surgery.
Yes, the pupil constricts when focusing for near vision due to the action of the ciliary muscles, which causes the lens to thicken in order to focus on nearby objects.