What Is Normal Pupil Size?
Pupils are the black-colored circles in your eyes that allow light to enter. The pupil is surrounded by the colored part of the eye called the iris, which is responsible for adjusting the diameter of the pupil to let more or less light in. The pupil is in a round shape and appears black because the light striking it’s absorbed into deeper parts of the eye.
What is normal pupil size? In general, the pupil size ranges from 2 to 8 mm. However, the size of the pupil keeps changing throughout the day according to the lighting conditions around you. If you are in a bright environment, the pupils would be in a smaller size allowing less light to enter the eye. In the dark environment, the pupil will expand to let more light enter.
Why Does the Pupil Change Size?
In the above part, you have learned what the normal pupil size is. Meanwhile, the pupil size changes with the environment. We have introduced the pupil size changes according to the bright or dark environment. If the pupil size is too big, it may become dilated pupils.
Of course, their size also changed according to other factors. Now, we will show some of them.
Pupil changing size may be caused by the emotions. Processing or experiencing emotions lead to changing pupil sizes too. The pupils slightly expand or dilate every time you feel excited or nervous. Seeing strong emotional cues like a person laughing or crying also lead to some differences in pupil sizes. In general, your pupil expands if you vividly feel a positive or negative emotion or when you are concentrating hard on a particular task like solving a math problem or retrieving a memory.
In addition, pupil size also is affected by medications and drugs. Both prescription and over-the-counter drugs can cause your pupils to expand.
So, why does the pupil change size? It can be affected by many factors such as light environment, emotions, drugs, medications, and so on.
To sum up, this post from Koalaeye Optical has shown what the normal pupil size is and what may cause the changing of pupil size. If you have any different ideas for normal pupil size, share them in the comment zone. If you have any problems with glasses, please contact us via the email email@example.com and we will reply to you as soon as possible.