Precorneal Film

The precorneal film is a thin layer of tear fluid that is located on the anterior surface of the cornea and protects its epithelial surface from drying out. This film forms naturally and is an important part of the normal functioning of the eye.

The cornea, or cornea, is the clear and smooth outer surface of the eye that protects the internal structures of the eye from damage and allows light to pass through the eye. Without the precorneal film, the epithelial surface of the cornea can dry out and become damaged, which can lead to the development of various eye diseases such as keratitis, conjunctivitis and others.

One of the main functions of the precorneal film is to retain moisture in the eyes. It creates a protective layer on the surface of the cornea and prevents it from drying out. This is especially important in low humidity conditions, where eyes can dry out more quickly. In addition, the precorneal film has antibacterial properties, which helps prevent the development of infections in the eyes.

The formation of the precorneal film occurs naturally. When tear fluid is produced by the tear glands, it passes through the nasolacrimal duct and onto the surface of the cornea. The tear fluid is then distributed over the surface of the cornea due to blinking and other eye movements.

However, in some cases, there may be insufficient production of tear fluid or a disturbance in its distribution on the surface of the cornea. In such cases, a thin film may form on the surface of the cornea, which leads to disruption of its function.

To maintain the normal function of the precorneal film, it is necessary to monitor its formation and distribution. This can be done, for example, by using moisturizing eye drops, which help maintain moisture in the eyes and prevent the formation of a film on the surface of the cornea. It is also recommended to avoid factors that can lead to dry eyes, such as working at a computer or reading in a room with low air humidity.

The precorneal film or opaque film of the cornea is a relatively thin, structureless translucent layer of thin tear film about 0.6–0.8 mm thick, covering the entire or almost the entire anterior surface of the cornea of ​​the eye and consisting of tear film lipids produced by the conjunctival glands, cellular elements of the conjunctiva and tear fluid.

It is believed that the epithelium, after exposure to a dry atmospheric environment, can die within 5-7 minutes. After this, irritating substances and microorganisms will pass through the epithelial defects. Just for prevention