During a severe headache, many people become very sensitive to bright lights, and the body attempts to combat this by contracting the pupil. Insecticide poisoning can be deadly if not treated properly. In some cases, intracerebral hemorrhage may require surgical intervention. Pupils that are abnormally small under normal lighting conditions are called pinpoint pupils. Horner syndrome – A rare condition caused by a tumor, stroke or damaged brainstem, Horner syndrome can affect the nervous system and be a sign of life-threatening complications in the neck or upper body. Small, reactive pupils: Introduction. Anisocoria which is worsened (greater asymmetry between the pupils) in the dark suggests the small pupil (which should dilate in dark conditions) is the abnormal pupil and suggests Horner's syndrome or mechanical anisocoria. If your pinpoint pupils are due to Horner syndrome, you might also have a drooping eyelid and decreased sweating on one side of your face. Research the causes of these more general types of symptom: Pupil symptoms (182 causes) Eye symptoms (5412 causes) Head symptoms (10192 causes) Face symptoms (8109 causes) more … Dilated or contracted pupils can come and go rarely, occur frequently, or persist indefinitely. Health Care Small, reactive pupils: Causes; Diagnosis. After cataract surgery the pupil is usually dilated slightly as a result of the drops that were used during the procedure. In bright light, your pupils constrict (get smaller) to prevent too much light from entering your eyes. Babies with Horner syndrome might have one iris that is lighter in color than the other. A dilated pupil sometimes can still react to light — that is, get smaller in bright light or when a light is shined at the eye. Does this mean dilated pupil attraction is a myth? What Is Cognitive Behavioral Therapy for Insomnia? The danger of experiencing changes in pupil size can vary depending on how much of a drug is used and other personal factors. This is called abnormal miosis, and it can happen in one or both of your eyes. These symptoms, which may indicate an overdose, require emergency medical attention: How your doctor approaches diagnosis will depend, of course, on the bigger picture. 3. Drugs that can cause pupil constriction (i.e., small pupils) are alcohol and opioids (heroin, morphine, etc. When exposed to toxic chemicals, seek medical treatment quickly. Overdose symptoms may include a pale or clammy face, blue or purple fingernails, shallow breathing or a slow heartbeat. It’s usually treated with prescription eye drops to reduce inflammation and open up the pupil. The opposite of mydriasis is called miosis and is when the iris constricts to cause very small or pinpoint pupils. Dizziness and Small (constricted) pupils. They can signify many issues, including drug use, poisoning, or a hemorrhage. It can be a sign of opium overdose. For an opioid overdose, how well you recover and how long it will take depends on: If you’ve ever had a problem with opioid abuse or other substance abuse, make your doctors aware of this when you need treatment, especially for pain. It’s the only way you’ll get a proper diagnosis. Insecticide poisoning can be treated with a drug called pralidoxime (2-PAM). The Narrow Pupils of Arousal. Of course not. Specific medications known as mydriatics are administered to dilate the pupils for ophthalmologic examination. Sometimes the cause can’t be determined. Employer/HR In the event of an opioid overdose, emergency personnel can use a drug called naloxone to reverse the life-threatening effects of opioids. 2. In bright light, your pupils get smaller (constrict) to limit the amount of light that enters. 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