Pupillary dilation, commonly known as mydriasis, is an involuntary expansion or widening of the pupils in the eyes, leading to a decrease in visual acuity. Pupil dilation occurs due to the contraction of the radial muscle in the iris, the colored part of the eye. Understanding how to check pupil dilation is a valuable skill in assessing a variety of medical conditions.
Checking pupil dilation involves observing the size and reactivity of the pupils to light. Dilation can indicate various physiological and pathological conditions, including neurological disorders, eye diseases, drug use, and brain injuries. Historically, pupil dilation was observed using simple techniques, but advancements in technology have introduced sophisticated instruments like pupillometers and infrared cameras, enhancing the accuracy and objectivity of the assessment.
