Pupils dilate

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Are dilated pupils a cause for concern? Pupil Dilation, Pupils Dilate, Lying Eyes, Adrenergic Receptors, Dilated Pupils, Alcohol Withdrawal, Parts Of The Eye, Cranial Nerves, Blurry Vision

What is the pupil? The pupil is the black hole located in the centre of the iris, the part that gives colour to the eye. The pupils change size depending on the lighting, measuring from 2 to 4 mm in bright light and from 4 to 8 mm in low light or darkness to increase the amount of light the eyeball receives, and also influence the ability to eye focus. The pupil works thanks to two muscles: the sphincter of the pupil, which closes it, and the dilator muscle of the pupil, which opens it. Why…

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