![]() Let us know if you have nausea, vomiting, severe headache, eye pain or redness, extreme pain with bright lights, haloes around lights or sudden decrease in vision. Talk to your eye professional about any concerns you have regarding pupil dilation, its risks, how it will be done, or what the results may indicate. It may also be difficult to return to work or school immediately following the exam. You may want to wear sunglasses when you go outside or into a brightly lit room. We recommend that you arrange to have someone drive you home because of blurred vision and light sensitivity. It naturally changes size without you noticing or controlling it. The pupil is the black center of your eyes that expands and contracts to help you see in different amounts of light. Children’s eyes may remain dilated for up to 12 to 72 hours. What is anisocoria Anisocoria is the medical term for when one of your pupils is bigger than the other. Your eyes will remain dilated for one to four hours, occasionally longer. Tell your eye doctor if you or anyone else in your family has a history of narrow angle glaucoma, or if you are allergic to dilating or anesthetic eye drops. For starters, oxytocin and dopamine the love hormones have an effect on pupil size. The drops take about 15 to 20 minutes to dilate the pupil fully. ![]() Pupil dilation is needed to help detect and diagnose important sight-threatening diseases such as cataracts, age-related macular degeneration, glaucoma, diabetic retinopathy, retinal vein occlusions, and retinal detachment. ![]() Dilation is also required for Optical Coherence Tomography (OCT), laser surgery, and other procedures. The fundus contains the retina, the optic nerve, and other structures. Learn why it is dangerous for the pupils to be dilated for too long. This could be in response to low-light conditions, feelings of fear, excitement, or arousal, but it can also be the result of injury or substance abuse. As part of your eye examination, you may receive drops to widen (dilate) your pupils to allow a detailed view of the back of your eye (fundus). Pupil dilation is also known as mydriasis, when the pupils in the eyes become larger than normal.
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