Pupil dilation

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Pupil Diameter. Pupillary constriction decreases the diameter of the pupil to reduce the amount of light entering the eye. Pupillary constriction is controlled by the parasympathetic division of the ANS. Pupillary dilation increases pupil diameter to increase light entry into the eye and is controlled by the sympathetic division. Ophthalmology Notes, Optometric Technician, Diagram Of The Eye, Pupil Dilation, Improve Eyesight Naturally, Optician Training, Eye Health Facts, Optometry Education, Eye Medicine

Pupil Diameter. Pupillary constriction decreases the diameter of the pupil to reduce the amount of light entering the eye. Pupillary constriction is controlled by the parasympathetic division of the ANS. Pupillary dilation increases pupil diameter to increase light entry into the eye and is controlled by the sympathetic division.

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Are dilated pupils a cause for concern? Pupil Dilation, Lying Eyes, Dilated Pupils, Adrenergic Receptors, Alcohol Withdrawal, Droopy Eyelids, 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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