PERRLA: How It’s Done And What it Means for Pupils Testing

Princess A.
7 Min Read

Perrla; In addition to allowing you to see the world, your eyes provide important information about your health. That’s why doctors use a variety of techniques to examine their eyes.

In this article, we will be taking you through all you need to know about Perrla to its bream. Explore carefully not to miss out on any vital information.

However, to make things much easier for you below is a quick navigation table of content.

What is PERRLA?

You may have heard that the ophthalmologist mentions “PERRLA” when he talks about testing your pupils. PERRLA is a shortcut that is used to document a common pupillary response test.

This test is used to verify the appearance and function of your pupils. The information can help your doctor diagnose many conditions, from glaucoma to neurological diseases.

What Does PERRLA Stand For In Medical Terms?

PERRLA: This is an acronym that helps doctors remember what to check for when examining their pupils. It simply stands for:

  • Pupils: The pupils are in the center of the iris, which is the colored part of your eye. They control how much light enters the eye by shrinking and widening.
  • Equal: Your pupils should be of the same size. If one is larger than the other, your doctor will want to do some additional testing to figure out why.
  • Round: Pupils should also be perfectly round, so your doctor will check them for any unusual shapes or uneven borders.
  • Reactive to: Your pupils react to your surroundings to control how much light enters your eyes. This step reminds your doctor to check your pupils’ reactions to the next two items in the acronym.
  • Light: When your doctor shines a light in your eyes, your pupils should get smaller. If they don’t, there could be a problem affecting your eyes.
  • Accommodation: Accommodation refers to your eyes’ ability to see things that are both close-up and far away. If your pupils are nonreactive to accommodation, it means they don’t adjust when you try to shift your focus to an object in the distance or near your face.
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How Is PERRLA Being Done?

To take the pupil exam your doctor will ask you to sit in a room with low light. They will begin simply by looking at their pupils, noticing something unusual in their size or shape.

After that, they will perform an eye oscillation test. This involves moving a small flashlight that lasts from side to side between the eyes every two seconds while looking remotely.


They will do it several times to see how their pupils react to light, even if they react at the same time.

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Finally, your doctor will ask you to concentrate on a pen or index finger. They will move it towards you, away from you, and from side to side.

The purpose is to verify if your students can focus properly. They should shrink when they look at something that changes their views.

What Do The PERRLA Results Mean?

Perrla Pupils’ test results can indicate many cases, depending on what part of the test was unusual.

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1. Uneven size or shape

If your pupils have a size difference of more than one millimeter (called anisocoria) or are not completely round, you may have an underlying condition that affects your brain, blood vessels, or nerves.

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However, one in five people who do not have eye health problems have pupils who are generally different.

Some examples of cases that cause pupils of different sizes include:

  • Brain injuries, such as a concussion
  • Aneurysm
  • Glaucoma
  • Brain tumor
  • Brain swelling
  • Intracranial hemorrhage
  • Stroke
  • Seizure
  • Migraine

2. Not reactive to light or accommodation

If your pupils aren’t responding to light or moving objects, it could indicate:

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  • Optic neuritis
  • The optic nerve damage
  • Optic nerve tumor
  • Retinal infection
  • Ischemic optic neuropathy
  • Glaucoma
  • An overactive ciliary muscle, located in the middle layer of your eye
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Also, Keep in mind that the results of the pupil test are generally not sufficient to diagnose any condition. Instead, they give your doctor a better idea of what other tests they can use to help reduce the symptoms they can cause.

What is Perrla for Eyes?

Perrla eye is an abbreviation used to express the natural eye. There are some people who do not use the letter A in the abbreviation.

This is because there are certain conditions that cannot cause a bright reflection in the dark.

The child cannot reach the reflex. The clinical use is only to verify the quantitative reaction and has no other uses. The eye should focus on the spot until you see it sharply.

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This lens is compatible with a thin filament system called zonula. The ciliary muscles will begin to react with thickening and thinning.

What Is A PERRLA Eye Assessment Test?

PERRLA Eye Assessment Test is like a mental checklist the doctor runs down in his/her mind as they looks specifically at your pupils.

PERRLA Test can’t diagnose eye problems, but it helps your doctor know if there’s something worth looking into.


 Spector RH. (1990). Chapter 58: Pupils.


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