Pupil Assessment Perrla is a series of test that is conducted by medical examiners to see if a patient’s optic nerves are in great condition. This kind of assessment is important to keep a record on because other ways of physical examination may or may not turn in results that lead to proper diagnosis of a patient’s condition. Some ocular concerns such as brain tumor, retinal diseases, or internal eye injuries can only be discovered through PERRLA assessment. CAT scan or MRI may be thorough on their ways of uncovering diseases but eyes are of another story. The organ is so delicate that even the most advanced technology might find it difficult to see through. Granted, saying that PERRLA assessment can deliver exact and precise diagnosis about a patient’s condition is a bit of a stretch. There should be further examinations and tests to properly derive a diagnosis. But at the very least, the assessment would give a doctor proper information about a patient’s initial condition to use as a base to better plan out a working treatment for the patient.
Pupil Assessment Perrla focuses on how a patient’s pupils react to stimuli. The pupils dilate and constrict according to the kind of stimulus they receive. This movement of the pupils are regulated by central nervous system, which why it makes sense that if they react abnormally, it is safe to assume that there is something wrong within. The PERRLA test focuses on three major aspects:
- The size of the pupils,
- The shape of the pupils, and
- The reactivity of the pupils to light and accommodation.
Of them all, the size of the pupils are arguably more potential in revealing the truth and a medical examiner’s office could be fitted with a size chart to help them figure out if a patient’s pupils are normal. Some diseases affect the size of a patient’s pupils in a more direct way. Someone suffering from glaucoma may have pupils that are mid-dilated. Aneurysm sufferers will have pupils that are dilated especially if the aneurysm has already pushed against a blood vessel on the brain. The size of the pupils is also affected if there is a tumor growing near the fibers of pupillary nerves. And cancer located on top of a lung can impact on pupillary nerves. Stroke affects the way your pupils appear while cluster headaches force the pupils to constrict. Sufferers of syphilis may have Argyll-Robertson pupils, a condition in which the pupils are unequal with one another, appear small and misshapen.
So, what is the measurement of the pupils for them to be considered normal? A normal pupil should be about 5 mm when it dilates and about 2 mm when it constricts. Be aware that this is an ideal size that should be observed on both pupils. Younger people typically have pupils that dilate wider than those of the adults or elderlies. It should also be kept in mind that the way the pupils react is controlled by a long nerve pathway. Obstructions along this pathway could also affect the way the pupils respond to stimuli.