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About Abnormal pupil size
The normal pupil size in adults varies from 2 to 4 mm in diameter in bright light to 4 to 8 mm in the dark. The pupils are generally equal in size. The pupil dilates in the dark. Both pupils constrict when the eye is focused on a near object. The pupil is abnormal if it fails to dilate to the dark or fails to constrict to light or accommodation. One may be born with an abnormal pupil size or develop it later. One can experience it on an ongoing basis or only temporarily. Abnormal pupil size can lead to blurred vision, double vision, and loss of vision, headache, fever, nausea and stiff neck. One or several of the possible causes of abnormal pupil size could be direct trauma to the eye, concussion, bleeding in the skull, inflammation of the optic nerve, brain tumor, aneurysm, meningitis and seizure.
Dr. Saurabh Tandon
General Physician, Internal Medicine Specialist, Diabetes Specialist, Critical Care Specialist
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