pupilladilatációt

Pupilladilatáció, also known as mydriasis, refers to the dilation or widening of the pupil of the eye. The pupil is the black opening in the center of the iris that controls the amount of light entering the eye. In dim light, the pupil naturally dilates to allow more light to reach the retina, improving vision in low-light conditions. Conversely, in bright light, the pupil constricts to limit light entry and prevent overstimulation of the retina.

This physiological dilation is controlled by the iris muscles, specifically the dilator pupillae muscle, which is stimulated by the sympathetic nervous system. Pupilladilatáció can also be induced by various external factors. Certain medications, such as cycloplegic eye drops used during eye examinations, can cause temporary pupil dilation by paralyzing the muscles that control pupil size. Some recreational drugs, including stimulants like amphetamines and hallucinogens like LSD, are also known to cause significant pupil dilation.

Furthermore, neurological conditions affecting the brain or the nerves controlling the eye muscles can lead to abnormal pupil dilation. Trauma to the head or eye can also result in mydriasis. In some cases, pupilladilatáció can be a sign of a serious medical issue, such as a stroke or an increase in intracranial pressure. It is important to note that if unexplained or persistent pupil dilation occurs, medical attention should be sought. The size of the pupils can provide valuable diagnostic information to healthcare professionals.