Pupil

The pupil is the round hole in the center of the iris that allows light to enter the lens. This term comes from the Latin word for pupil - pupilla. The pupillary opening has a diameter of about 3 mm and can vary depending on the level of light.

The pupil is an important organ of vision that is responsible for focusing light on the retina. When light enters the eye through the pupil, it passes through the lens and hits the retina. There, light is converted into electrical signals, which are transmitted to the brain for processing.

When the eyes are in darkness or low light, the pupil dilates to let in more light. This allows you to see better in low light conditions. When the eyes are exposed to bright light, the pupil constricts to reduce the amount of light entering the retina and protect it from damage.

In addition, the pupil can be used to diagnose various eye diseases. For example, with glaucoma, the pupil becomes narrow and does not respond to changes in light brightness, which is a sign of this disease. The pupil is also used to measure intraocular pressure, which can be elevated with glaucoma.

Overall, the pupil is a very important organ of the eye and plays an important role in the process of vision. Knowledge of its functions and features can help in the diagnosis and treatment of various eye diseases and improve a person’s quality of life.

The pupil is the round hole in the center of the iris that allows light to enter the lens. It is an important part of the eye as it regulates the amount of light entering the retina and affects vision.

The pupil can change depending on many factors, including lighting, emotions, fatigue and even time of day. When we are in the dark, the pupil dilates to let more light into the retina, and when we see bright light, it contracts to protect the eyes from excess light.

Additionally, the pupils may change in response to emotional reactions such as fear, joy, or anger. For example, when we experience fear, our pupils dilate to increase the amount of light entering the retina.

For ophthalmologists, the pupil is an important diagnostic tool. They can use it to determine the condition of the eye and diagnose various diseases such as glaucoma, cataracts and retinal dystrophy.

In general, the pupil plays an important role in the functioning of the eye and is an indicator of the health of our body. Therefore, it is important to monitor his condition and consult a doctor if there are any changes.

The pupils are in each human eye and provide information about how bright the sun is shining. In the dark, the pupil dilates to let in more light, and in bright light it contracts, protecting the eye. Sometimes the opposite is true - instead of adapting to the light, a person closes his eyes or squints.