Perrla Stands for Pupils Equal Round Reactive to Light and Accommodation. You may ask what your doctor is examining by shining the bright light. You should know that it is not used to harass you but this check will give useful thing. The examination will explain the nervous system from your eyes. Usually, this examination is called a pupillary response test that aims to check the cranial nerves III and II. The nerve can transmit visual signals coming from the eye to the brain. Vision problems are caused by optic nerve damage. Oculomotor nerves can control the eye muscles. It can control the ability of the eyes and narrowing of the pupil to focus. Oculomotor nerves can be damaged due to several factors such as brain tumors, infections, and head injuries. This will cause make the pupils enlarged and blowing in the wind.
The Technique of Perrla Test
Usually, you will sit in the dimly room. The nurse or doctor will see the uniformity between the two pupils. The doctor will record the size and shape of the pupil. The doctor will hold the flashlight and move the flashlight into your eyes for two seconds. This flashlight is used to illuminate the light from your eyes. This examination is called a swinging flashlight test. The doctor will seek your response of flashlight and see the pupil size to be small.
Narrowing of other pupils should be done at the same time. It is the consensual respond from your eyes. The nurse or physician may use the forefinger or pen to see eyes fixed on the thing. The stick will be pulled again to see the focus on the eye. Pupils will narrow to see objects that are moving far or near, also you can read the full test in Perrla test.
The Result of Perrla Test
If the pupil experiences a decrease of responding to light, then this is relative afferent pupil effect. This is usually called Marcus Gunn. There are various factors that can cause this condition. Head injury can also cause damage to the nerve. This damage may cause the pupil’s ability to decrease. It is caused by plastic surgery, sinus, orbital, eye, and anesthesia. The Severe retinal disease can cause your eyes to be damaged. Abnormal accommodation reflexes can be caused by various conditions.
This is the important organ consisting of various nerves. Your eyes are windows for you. You can see the beauty of the world from your eyes. This simple test can be a window to the eyes system. Abnormal tests cannot provide the right diagnosis. Your eyes require a thorough medical examination for your eyes. You need explanation from the doctor after seeing the assessment results from the test. Your doctor may be able to suggest the right treatment after knowing your eye condition thoroughly by performing the test. There are some ophthalmologists who think that this test can not cover all the information but there are still many doctors who use this test to assess the condition of the patient’s eyes. That is the explanation of Perrla Stands for.