Pupillary membrane

The pupillary membrane is a thin transparent membrane that is located at the back of the pupil and regulates the amount of light entering the eye. It consists of three layers: outer layer, inner layer and middle layer.

The outer layer is a thin transparent film covering the pupil. It consists of collagen, which provides the strength and elasticity of the membrane. The inner layer is made up of cells called pigment cells. They are responsible for regulating the amount of light passing through the pupil by changing their shape and size. The middle layer consists of connective tissue, which provides support and stability to the membrane.

The pupillary membrane plays an important role in vision. When light hits the pupil, it passes through the outer layer and hits the pigment cells. Pigment cells change their shape and size to regulate the amount of light that passes through the pupil. This allows the eye to adapt to different lighting conditions.

In addition, the pupillary membrane is involved in regulating the temperature of the eye. When the ambient temperature rises, the pigment cells expand to increase the area of ​​the pupil and let in more light. When the temperature drops, the pigment cells shrink, reducing the area of ​​the pupil and letting in less light.

Thus, the pupillary membrane is an important element of the eye that regulates the amount of light entering the eye and is involved in regulating the temperature of the eye. Disruption of this structure can lead to various eye diseases, such as astigmatism, nearsightedness or farsightedness. Therefore, it is important to monitor the health of the pupillary membrane and consult a doctor if any symptoms appear.