5 Pupil Evaluation Tests for Improved TBI Treatment
Knowing the pupillary response in traumatic brain injury is one of the most critical aspects of treatment. The pupillary response test can be used to measure brain function by observing the size and reaction time of the pupils in both eyes. This test will help doctors diagnose TBIs and allow them to monitor for any changes in pupil size over time so that they can adjust their treatment accordingly. This article will explore five pupil evaluation tests that can be used to monitor the TBI treatment process.
Pupillary Light Reflex Test A standard pupillary evaluation test involves shining a light into one eye while measuring the response in both eyes. The pupil should constrict when exposed to bright light, allowing less light in and protecting the retina. This is known as the pupillary light reflex test, or PLR for short. Doctors will often use a penlight or flashlight to perform this test.
Near Response The near response test is another standard pupil evaluation method. It involves shining a light into one eye and asking the patient to focus on it. After a few seconds, move the light toward
their face until they can no longer see it with that eye alone. The doctor will then repeat this process in both eyes and look for differences between them.
Swinging Flashlight Test The swinging flashlight test is another way to evaluate the function of the pupil. For this evaluation, a doctor will hold up a small flashlight and move it back and forth in front of a patient’s eyes. The doctor will look for changes in pupil size as they move the light closer or farther away from their face.
Relative Afferent Pupillary Defect A complete evaluation of pupillary reaction checks for a relative afferent pupillary defect (RAPD). This abnormality is in the fibers that transmit nerve impulses from the retina to the brain. When these fibers are damaged, they can cause changes in pupil size that aren’t related to actual light exposure.
Neurological Assessment of the Pupils TBIs affect the eyes. When the brain is injured, so are the nerves and muscles that control eye function. The doctor will assess pupil reaction in various ways to uncover any neurological problems that could affect vision. Checking the patient’s pupils in bright and dim light is one of the first steps. The doctor will also look for pupil size, shape, and reactivity changes that could indicate an underlying problem or TBI. Doctors may perform a dilated eye exam if other tests have shown a neurological issue.