Dilated Pupils - Symptoms And Causes Of Dilated Pupils, Expert Opinion

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Dilated Pupils - Symptoms And Causes Of Dilated Pupils, Expert Opinion
Dilated Pupils - Symptoms And Causes Of Dilated Pupils, Expert Opinion
Video: Dilated Pupils - Symptoms And Causes Of Dilated Pupils, Expert Opinion
Video: Why Do Some Drugs Make Your Pupils Wider? 2023, February

Last updated 26 July 2017 at 18:39

Reading time: 4 minutes

Dilation of the pupils can occur due to natural causes, or it can be a symptom of an emerging disease that appears in people of different ages.

The pupil changes size due to contraction of the circular and radial muscles. The circular muscle is responsible for constriction, and the radial muscle is responsible for its expansion.

Dilated pupils, natural causes:

  1. reaction to light. It manifests itself in people of all ages. In the absence of other symptoms of any disease, you should not worry;
  2. reaction to eye drops. Some of the eye treatments cause dilation of the pupils, but gradually the reaction fades away and there are no negative consequences;
  3. reaction to darkness;
  4. stress;
  5. attraction to the opposite sex.

Scientists during the study found that dilated pupils are also a reaction to:

  1. naked women in men;
  2. children in women.

From this it can be inferred, excluding medical reasons, people may have dilated pupils when they see what they like.


  • 1 Medical reasons
  • 2 Adie-Holmes syndrome
  • 3 Psychological factors
  • 4 Use of third-party substances
  • 5 Mydriasis in adolescents
  • 6 Permanently dilated pupils

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Medical reasons


They can expand due to the appearance and development of pathologies and diseases in the human body.

Such pathologies include:

  1. aneurysm;
  2. damage to the optic nerve;
  3. the appearance and development of a brain tumor;
  4. increased eye pressure caused by the appearance of glaucoma;
  5. prolonged and frequent migraines;
  6. swelling of the lymph node located in the upper chest;
  7. diabetes;
  8. contusion;
  9. lack of oxygen;
  10. trauma to the skull;
  11. reaction to medication;
  12. intracranial pressure;
  13. intoxication of the body;
  14. epilepsy;
  15. worms.

It is known that pupils can enlarge in the dark, which allows a person to see better in the dark. However, if the pupils do not dilate when entering the light, this may be a symptom of the body's intoxication. In this case, you should immediately consult a doctor.

Adie Holmes Syndrome


Adie-Holmes syndrome or in other words the dilated pupil syndrome. It is characterized by paralysis of the eye muscles, as a result of which the eyes lose their sensitivity to light.

The main symptom of Adie-Holmes syndrome is a dilated pupil, but its diameter can vary. When a person with this syndrome views something at close range, the pupil narrows and then expands instantly. Vision with Adie-Holmes syndrome significantly decreases.

Some of the factors that trigger its appearance:

  1. metabolic disorder;
  2. damaged ciliated node. This causes a violation of the innervation of the ciliary muscle and the sphincter of the iris. Because of this, pupil dilation occurs and myopia appears;
  3. avitaminosis;
  4. infectious diseases.
  5. symptoms of Adie-Holmes syndrome:
  6. the pupil increases in only one eye;
  7. weak reaction to light or its complete absence.

Psychological factors

The nervous system has a direct effect on the optic nerves, as does the emotional stability of a person. Due to emotional instability, hormones are released into the bloodstream. As a result, pupil enlargement occurs.

The reasons due to which the dilation of the pupils occurs:

  • fright;
  • fear;
  • extreme situation;
  • attacks of aggression;
  • sadness.

There are cases when the expansion is caused by genetic factors and is accompanied by certain signs:

  • redness of the eyes;
  • cramps and pain in the eyes;
  • distorted vision in bright light. Eyes spots or sudden flashes may appear;
  • decreased visual acuity.
  • a person with these symptoms is practically blind in the dark.

Use of third-party substances


Among other factors, alcoholic and narcotic substances affect the increase in human pupils. After their use, the pupil is in a dilated state for at least two more days.

In addition to the fact that a person who has taken drugs has dilated pupils, their use can be recognized by a number of signs:

  1. redness and shine of the eyes;
  2. lack of reaction to light;
  3. well-defined vessels in the eyes;
  4. unhealthy appearance of the skin. Pale or painful yellow;
  5. poor coordination;
  6. change in speech. Slow, accelerated, or overly sharp.

Mydriasis in adolescents


Most often, dilated pupils in a teenager are due to the use of drugs or alcohol. Parents should be very attentive and pay attention to the child's condition.

Drug use is not as easy to recognize as alcohol use. Drug use is not accompanied by a specific smell, unlike alcoholic beverages.

In addition to dilated pupils, there are signs that you first need to pay attention to:

  1. increased excitability or weakness;
  2. mood swings for no apparent reason;
  3. insomnia;
  4. intense thirst;
  5. unhealthy appearance: circles under the eyes and severe weight loss.

However, it is worth remembering that the presence of one of these signs can be a harbinger of the disease. For example, worms are accompanied by circles under the eyes, insomnia, weight loss. And also the infected person has permanently dilated pupils.

Permanently dilated pupils


If the pupils are in a dilated state all the time, this can be a sign of damage to the optic nerves and loss of sensitivity of the pupils to light. Moreover, when a person looks at the light, pain begins in the eyes.

People who experience these symptoms need to be careful in the dark, as they can hardly see in the dark. It is advisable not to drive at night.

A similar vision problem is common in adults. Since the eyes of children are more sensitive to light.

You should not treat the appearance of such symptoms carelessly. It is necessary to immediately consult a doctor who can make the correct diagnosis and prescribe treatment until irreversible damage to the eyes occurs.

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