pupillereaksjon

Pupillary reaction refers to the change in the size of the pupil in response to various stimuli. The pupil is the opening in the center of the iris that allows light to enter the eye. The size of the pupil is regulated by the muscles in the iris, which are controlled by the autonomic nervous system. Pupillary reactions can be either direct or consensual. Direct reactions occur when the stimulus affects the eye directly, such as changes in light intensity. Consensual reactions occur when the stimulus affects both eyes simultaneously, such as in the case of a bright light shining into one eye.

Pupillary reactions are important for visual function and are influenced by several factors, including age, health status, and the presence of certain medications. For example, the pupil may dilate (become larger) in response to dim light to allow more light to enter the eye, or it may constrict (become smaller) in response to bright light to protect the eye from excessive light. Pupillary reactions can also be affected by neurological conditions, such as Parkinson's disease or multiple sclerosis, and by certain medications, such as antihistamines or antidepressants.

Pupillary reactions are typically assessed using a device called a pupillometer, which measures the size of the pupil in response to various stimuli. This information can be useful for diagnosing and monitoring certain medical conditions, such as glaucoma or brainstem disorders. In some cases, pupillary reactions may be used as a screening tool for certain conditions, such as diabetes or high blood pressure. However, it is important to note that pupillary reactions should not be used as a substitute for a comprehensive medical evaluation.