
The phenomenon of shroom eyes refers to the distinctive visual alterations that occur after ingesting magic mushrooms, which contain the psychedelic compound psilocybin. Psilocybin affects the brain's serotonin receptors, leading to changes in perception, mood, and sensory experiences. Shroom eyes can cause a range of visual effects, including pupil dilation, enhanced colour perception, intricate geometric patterns, and increased ability to notice intricate details. While some individuals find the experience enjoyable and introspective, it is important to use magic mushrooms responsibly as it can also lead to impaired judgment, coordination issues, and negative emotions.
| Characteristics | Values |
|---|---|
| Common name | Shroom eyes, Psilocybin eyes |
| Cause | Psilocybin, the active compound in magic mushrooms |
| Effect | Visual alterations, enhanced visuals, altered perception |
| Pupil | Dilated pupils, increased light intake, enhanced visual sensitivity |
| Color perception | Distortion, enhanced saturation and vividness, increased brightness and color saturation |
| Visual patterns | Intricate geometric patterns |
| Enhanced detail | Increased ability to notice intricate details |
| Eye redness | Bloodshot or red eyes |
| Mood | Positive mood changes, negative emotions |
| Hallucinations | Visual and auditory |
| Synesthesia | Stimulation of one sense leading to experience of another sense |
| Serotonin modulation | Psilocybin influences serotonin levels in the brain |
| Brain activity | Altered brain activity, increased self-inhibition in visual brain regions |
| Therapeutic relevance | Potential to help relieve anxiety and depression |
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What You'll Learn

Psilocybin causes pupil dilation
Psilocybin, the active compound in magic mushrooms, is known to cause pupil dilation. This dilation of pupils, also known as mydriasis, is a common side effect of many drugs and occurs due to the impact of these substances on the central nervous system. Psilocybin mushrooms, commonly referred to as shrooms, contain the naturally occurring hallucinogenic compound psilocybin. When ingested, psilocybin converts into psilocin, which acts on serotonin receptors in the brain and produces hallucinogenic effects.
Psilocybin interacts with serotonin receptors, leading to changes in brain activity and subsequent pupil dilation. This dilation of the pupils, or "shroom eyes," is one of the most notable characteristics of the visual alterations that occur after ingesting magic mushrooms. The phenomenon of shroom eyes can manifest in various ways and lead to enhanced visual experiences. These experiences can include distorted colour perception, with colours appearing more vivid or intense, and the emergence of intricate geometric patterns in one's field of vision.
The effects of psilocybin on the brain's visual processing regions have been studied using neuroimaging techniques. These studies have found that psilocybin increases self-inhibition in these regions, reducing their sensitivity to external stimuli and resulting in vivid, internally generated visual imagery. The visual effects induced by psilocybin are one of the main subjective phenomena experienced by individuals under the influence of magic mushrooms.
It is important to note that while psilocybin mushrooms can provide enchanting visual experiences, they also come with potential risks and considerations. Users may experience altered perception of time, space, and reality, which can be disorienting. Hallucinations are also common, and impaired judgment and coordination can lead to accidents. As such, it is crucial to use magic mushrooms responsibly and be aware of the potential side effects, including pupil dilation.
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Visual hallucinations
Mushrooms are not literally endowed with eyes. However, the colloquial term "magic mushrooms" is used to refer to certain mushrooms that contain the psychedelic substance psilocybin, which can induce visual hallucinations in those who ingest them.
Psilocybin is thought to induce its effects by activating serotonin receptors in the brain, leading to altered perceptions, enhanced mood, and profound changes in consciousness. Neuroimaging research has found that psilocybin increases self-inhibition in visual brain regions and enhances top-down connectivity, leading to vivid, internally generated visual imagery. Specifically, psilocybin has been found to induce a pattern of increased self-inhibition in early visual and higher visual-association regions.
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Distorted colour perception
Consuming magic mushrooms can lead to a range of visual distortions, including altered colour perception. This phenomenon, often referred to as "Shroom eyes" or "Psilocybin eyes", is caused by the interaction of psilocybin with serotonin receptors in the brain, particularly those involved in visual processing.
One notable effect of psilocybin on colour perception is an increase in brightness and colour saturation, making objects appear more vibrant or even glowing. Colours may appear more vivid, intense, or even change altogether. This enhancement of colour perception is likely due to increased brightness and contrast responses, leading to enhanced saturation and vividness of images.
Neuroimaging studies have provided insights into the underlying brain mechanisms. These studies found that psilocybin increases self-inhibition in visual brain regions, making these regions less responsive to external sensory signals. As a result, the brain's internal activity takes precedence, leading to vivid, internally generated visual imagery, especially when the eyes are closed or in low visual sensory environments.
Additionally, psilocybin has been shown to enhance top-down connectivity within the brain, which may contribute to the enhanced colour perception and other visual phenomena. It is worth noting that while some individuals find these visual experiences enjoyable and introspective, they can also be disorienting and unsettling for others.
The effects of magic mushrooms on colour perception are temporary, with pupils typically remaining dilated for 4-6 hours but can persist for up to 24 hours in some cases. However, there have been rare reports of lasting visual disturbances, and it is recommended to seek medical advice or an eye exam if such issues arise.
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Serotonin modulation
Psilocybin, the psychedelic compound in magic mushrooms, influences serotonin levels in the brain. Serotonin is a neurotransmitter associated with mood and perception. By interacting with serotonin receptors (5-HT2A), psilocybin alters visual perception and pupil size. This interaction triggers serotonin release, overstimulating the nervous system and leading to enlarged pupils or pupil dilation, a characteristic feature of "shroom eyes".
Psilocybin increases self-inhibition in visual brain regions, reducing their sensitivity to external stimuli. This means that the brain's internal activity takes precedence, resulting in vivid, internally generated visual imagery, particularly when the eyes are closed. This aligns with the concept of psychedelics as 'mind-manifesting' substances, enhancing top-down processes.
The effects of psilocybin on serotonin modulation can lead to a range of visual and perceptual changes. Colours may appear more vivid or intense, and intricate geometric patterns may emerge in the field of vision. Some individuals report enhanced detail perception, noticing intricate details in their surroundings. Additionally, psilocybin can distort colour perception, leading to surreal visuals and changes in colour.
The modulation of serotonin by psilocybin can also result in altered perception of time, space, and reality, contributing to a disorienting experience for some individuals. Mood changes are common, with positive mood enhancements reported, but negative emotions may also arise. Hallucinations are another possible effect, which can be both fascinating and unsettling.
While the serotonergic effects of psilocybin can induce these intriguing phenomena, it is important to remember that magic mushrooms can have both short-term and long-term mental health and physical effects. They can alter thinking, senses, and emotions, and high doses may lead to a "bad trip," characterised by paranoia, flashbacks, and impaired judgment. Additionally, some individuals may experience lasting visual disturbances, such as permanently dilated pupils, even after ceasing mushroom use.
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Potential long-term effects
The phenomenon of "shroom eyes" or "psilocybin eyes" refers to the distinctive visual alterations that occur after ingesting magic mushrooms containing the psychedelic compound psilocybin. While these experiences can be awe-inspiring and enjoyable for some, they can also have potential long-term effects and risks. Here are some key potential long-term effects to consider:
Enhanced Visual Sensitivity and Distortion: Psilocybin triggers serotonin release, which overstimulates the nervous system, leading to enlarged pupils or pupil dilation. This dilation can last for 4-6 hours and up to 24 hours in some cases. Increased pupil size allows more light to enter the eye, resulting in enhanced visual sensitivity. Additionally, psilocybin can distort color perception, making colors appear more vivid, intense, or even change altogether. These visual distortions may persist or recur even after the acute effects of psilocybin wear off.
Altered Perception: Magic mushrooms can induce altered perceptions of time, space, and reality. Users may experience a distorted sense of self, loss of boundaries, and detachment from reality. These alterations in perception can be disorienting and lead to feelings of paranoia or impaired judgment, increasing the risk of accidents. In some cases, these perceptual changes can persist long-term, leading to what is known as hallucinogen persisting perception disorder (HPPD). HPPD is characterized by persistent perceptual abnormalities and hallucinations that continue long after stopping the use of hallucinogenic drugs.
Mental Health Impact: Psilocybin interacts with serotonin receptors in the brain, which are closely linked to mood and perception. While some users may experience positive mood changes, negative emotions, anxiety, and paranoia can also arise during or after the acute effects of psilocybin. In some cases, these negative mental health effects can persist or recur, even after a single use. Additionally, high doses of psilocybin can lead to what is known as a "bad trip," which may involve frightening experiences, abrupt flashbacks, and impaired judgment.
Physiological Changes: In rare cases, long-term and repeated use of psilocybin mushrooms may lead to permanently dilated pupils. This condition is likely due to pathophysiological changes triggered by the drug, resulting in a permanent enlargement of the pupil. Additionally, some individuals may experience other long-term physical effects, such as changes in their nervous system or sensory processing.
It is important to note that the long-term effects of psilocybin mushrooms can vary between individuals and may depend on various factors such as dosage, frequency of use, and individual brain chemistry. While there is ongoing research into the therapeutic potential of psilocybin, it is crucial to approach the use of magic mushrooms with caution and seek professional guidance if any adverse effects occur or persist.
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Frequently asked questions
They don't—but here are some answers to questions you may have about "mushroom eyes" or "shroom eyes."
Mushroom eyes, or shroom eyes, are a set of noticeable changes to the eyes after consuming magic mushrooms.
Shroom eyes are caused by the interaction of psilocybin (the active compound in magic mushrooms) with serotonin receptors, which influence visual perception and pupil size.
Shroom eyes can cause pupil dilation, enhanced colour perception, intricate visual patterns, and an increased ability to notice intricate details.
No. While some people experience positive mood changes, enhanced visuals, and a sense of relaxation, others may have negative experiences such as a "bad trip," paranoia, and impaired judgment.
Shrooms are classified as Schedule 1 drugs, meaning they have "no accepted medical use." While there is ongoing research into their potential therapeutic benefits, especially for treating depression and anxiety, consuming shrooms comes with risks and side effects, including short-term and long-term mental health issues.

























