![]() Typically, with physiologic anisocoria, the difference in pupil size between the two eyes is small, about one millimeter or less. Anisocoria that is NOT caused by a medical problem is called physiologic anisocoria. The amount of anisocoria can be different from day-to-day and can even switch eyes. Up to 30% of people have anisocoria and it is normal for them. Anisocoria can be normal (physiologic), or it can be a sign of a medical problem. The term anisocoria means that the pupils are not the same size at the same time. Normally pupils are in the same size, with both eyes dilating or constricting together. Is it normal to have pupils of different sizes? In the center, the dark spot is a hole in the iris called the pupil. ![]() 1: The iris is the colored part of the eye. When in a dark room the pupil usually gets bigger (or dilates) to allow more light to enter the eye. When in a bright room or in sunlight, the pupil usually gets smaller (or constricts). The size of the pupil depends on how much the iris muscle is constricted (tightened). The empty hole in the middle, which allows light to enter the eye, is called the pupil. It is a round muscle, similar in shape to a donut. The colored part of the eye is called the iris. To learn more about possible treatment options for opioid abuse, please contact us today. A medical detox program is overseen by a healthcare professional so you can better manage withdrawal symptoms.Īfter detox, more intensive treatment programs may be needed. If you see a loved one struggling with chronic opioid use, a detox program can be helpful to flush the drug out of their system. It can be hard to quit opioids on your own. Long-term substance use of opioids can lead to physical dependence, addiction, and withdrawal. Treating Opioid MisuseĬonstant pupil constriction due to opioids may be only one sign of more serious health effects. If you or a loved one show signs of opioid overdose, you will likely need immediate medical attention. In patients who have experienced an opioid overdose, their pupils may also dilate or grow wider. These two body states can trigger an autonomic sympathetic nervous system (SNS) reaction, which can lead to dilated pupils. This can lead to a lack of oxygen in the brain, and high amounts of carbon dioxide in the blood. During an opioid overdose, severe respiratory depression (slowed breathing and heart rate) can happen. In more extreme cases, opioids can also lead to dilated pupils. If you see constricted pupils, along with other symptoms, in a family member or loved one, this may be a sign of substance abuse. Other side effects that come with opioid use include: However, opioids can cause other, more dangerous side effects. Pinpoint pupils are usually not a dangerous side effect of opioid use. Are Constricted Pupils Bad For Your Health? ![]() Drugs that can cause miosis include benzodiazepines, antihistamines, some eye drops, and opioids. When the pupil contracts, it is usually due to bright lights.ĭrug use is a common cause of eye miosis. When the pupil gets larger (also known as pupil dilation or mydriasis), it is usually to see better in the dark. Anatomy Of Pupil ConstrictionĪ pupillary response is usually a light reflex, or to let more or less light in. Changes in dopamine may affect the complex structures of your eyes. Taking opioids can change dopamine levels in your body. Some of these functions are in the eye, where dopamine affects the retina and certain aspects of your vision. Dopamine is a neurotransmitter that controls motivation, movement, and several body functions. Opioids increase amounts of dopamine in the brain. Frequent constricted pupils can be a visible sign of possible drug abuse. Many opioids are known to cause constricted pupils, including brands of hydrocodone, fentanyl, oxycodone, and codeine. One side effect of opioid/opiate use is reduced pupil size, also known as pinpoint pupils or miosis.
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