What Does It Mean When Your Eyes Are Dilated

In dilation your doctor uses special eye drops to force the pupil to stay open.

Your pupils get bigger or smaller depending on the amount of light around you. Head trauma may also produce dilated or unequal pupils that accompany other brain injuries. Dilated pupils or pupils that are unequal in size can be a sign of serious conditions affecting the brain including stroke bleeding or tumor and often signal the presence of a medical emergency. The size of your pupils is controlled by muscles in the colored part of your eye iris and the amount of light reaching your eyes.

Specific medications known as mydriatics are administered to dilate the pupils for ophthalmologic examination. The pupils are small circular openings that control how much light enters the eyes. Often abnormally dilated pupils are also fixed pupils. Dilation or widening of the pupils of the eyes is normal in conditions of low light in order to allow more light to reach the retina.

In bright light your pupils constrict get smaller to prevent too much light from entering your eyes. Muscles in the colored part of your eye called the iris control your pupil size. In low light your pupils open up. Medically dilation of the pupils is known as mydriasis.

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