Benign Episodic Unilateral Mydriasisīenign episodic unilateral mydriasis (BEUM) is a temporary condition that creates a dilated pupil in only one eye. The extent of drug abuse will determine the severity of the symptoms. Stimulants such as cocaine increase levels of serotonin and cause similar effects on the eyes. Hallucinogenic drugs, such as LSD, affect the serotonin receptors in the brain, which can lead to dilation. Using drugs such as cocaine, ecstasy, hallucinogenics, and crystal methamphetamine can lead to mydriasis. Oxytocin primarily causes psychological effects, such as increased emotional attachment and sexual arousal. Research suggests that higher levels of oxytocin may help heighten the response to human faces. It also plays significant roles during childbirth. Oxytocin is released because of exercise and intimate physical or social interactions with other people. Increased levels of oxytocin may lead to a temporary mild to moderate dilation of pupils. Other symptoms will vary depending on the cause of your injury. This can disrupt the normal response pupils have to levels of light in the environment. Injury to the eye, such as blunt force trauma, may damage the nerves controlling the pupils or the iris, the pigmented part of your eye. Stopping these medications should return your pupils to normal. If mydriasis is caused by prescription medication, you may also have blurry vision and dizziness. They can also cause constipation, dry mouth, and decreased sweating.Īnticholinergics are typically found in prescription drugs. Anticholinergics cause your pupils to become more dilated. These are some of them: AnticholinergicsĪnticholinergics are substances that block specific chemicals from being transmitted to the eyes, as well as to certain muscles and glands. Mydriasis can happen for many different reasons.
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