![]() ![]() This can cause symptoms like floaters, blurry vision, and double vision. Over time, meth abuse and addiction can cause permanent nerve damage in your retina (the light-sensitive layer at the back of your eye). This disease makes you feel unable to stop using meth even if you want. Meth also poses a high risk of drug addiction (also called substance use disorder). These effects are sometimes called “meth eyes.” Meth can also cause blurry vision and involuntary eye movements. As with cocaine, meth’s effect on pupil size is likely related to an increase in dopamine. Methamphetamine (or “meth”) is an extremely powerful stimulant drug. In addition, like alcohol, cocaine expands the blood vessels around your pupils, which can lead to bloodshot eyes. Dopamine is a neurotransmitter that boosts feelings of pleasure, reward, and motivation. This is probably because cocaine increases the amount of dopamine in your brain. It can also be made into smokeable rocks called crack cocaine.Īll forms of cocaine can cause dilated pupils. It’s available as a white powder that can be snorted or injected. As a stimulant, it speeds up your central nervous system, causing a rush of energy and euphoria (intense joy). CocaineĬocaine is an illicit drug made from the leaves of the coca plant. For example, you might take higher doses than prescribed or use them without a prescription. You’re more likely to experience this effect if you abuse benzodiazepines, which means you use them in a manner not prescribed by a medical professional. Along with making you feel calm and drowsy, GABA can cause dilated pupils. Some of the most popular benzodiazepines include alprazolam (Xanax), clonazepam (Klonopin), and diazepam (Valium).Īll benzodiazepines enhance the effects of a neurotransmitter called gamma-aminobutyric acid (GABA). night blindness (poor vision in dim light)īenzodiazepines (or “benzos”) are prescription drugs used to treat anxiety, seizures, and insomnia.bloodshot eyes, as alcohol expands the blood vessels around your pupils.The National Institute on Alcohol Abuse and Alcoholism (NIAAA) defines binge drinking as having 4 or more drinks in about 2 hours for women and having 5 or more drinks in about 2 hours for men.Īlong with dilated pupils, other eye-related effects of alcohol may include: Pupil dilation is a common side effect of alcohol, especially if you binge drink. Here are eight of the most popular drugs known to cause pupil dilation. That’s because drugs affect neurotransmitters (brain chemicals), which can impact pupil size. In some cases, your pupils will dilate (get bigger) when exposed to light or other stimuli, including certain drugs. Pupils are tiny, dark circles at the center of your eyes. ![]()
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