Lachrymal gland

The lacrimal gland produces most of the tear fluid that is supposed to protect the eyeball from dehydration. The tear fluid has a high salt content and also bactericidal properties. If there are too many tears that can not be overcome by the draining tears, they flow over the lower edge of the lid.

Lachrymal gland

The lachrymal gland produces most of the tear fluid that is supposed to protect the eyeball from drying out. The tear fluid has a high salt content and also bactericidal properties. If there are too many tears that can not be overcome by the draining tears, they flow over the lower edge of the lid. The lacrimal gland is part of the tear apparatus. Read more about the lacrimal gland!

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lachrymal gland

  • What is the lacrimal gland?

  • What is the function of the lacrimal gland?

  • What problems can the lacrimal gland cause?

What is the lacrimal gland?

The lacrimal gland (Glandula lacrimalis) is a hazelnut-sized, paired gland, which lies in the frontal bone about above and to the side of each eyeball. Through the tendon of a muscle that lifts the upper lid, it is divided into two parts: a larger, upper part, which rests against the bone and a smaller, lower part, which rests against the lid.

In addition to this main lacrimal gland, there are several small lacrimal glands in the upper and lower eyelid conjunctival folds. The eye would not dry out, even if the two large lacrimal glands were removed.

Through small excretory ducts of the main lacrimal glands, the tear fluid passes from the outer upper corner of the eye into the fold between the conjunctiva of the eyeball and the upper lid. Through the movements of the eyelids, the tear fluid passes through the conjunctival sac to the inner corner of the eye, where it flows into the TrΓ€nensee.

There are tear points that open into tears, into which the tear fluid is sucked by a pumping mechanism. After a few bends, these tear tubes end in the lacrimal sac, which is close to the nose. The lacrimal sac drains into the nasolacrimal duct, through which the tear fluid finally flows under the lower turbinate.

lacrimal apparatus

The lacrimal gland is part of the tear apparatus. This also includes conjunctival sac, tear tubule, lacrimal sac and tear gastric gangue.

What is the function of the lacrimal gland?

The function of the lacrimal gland and the entire lacrimal system is mainly in the moistening of the cornea and conjunctiva in order to protect them from drying out. Foreign objects that reach the eye are removed from the eye by the tear fluid with the blink of the eye. Antibacterial enzymes in the tear fluid prevent eye infections.

In addition, the tear fluid for the nutrition and the elimination of the cornea.

What problems can the lacrimal gland cause?

When the lacrimal gland is obstructed, the tears run over the lower edge of the lid and onto the cheeks (Epiphora). The reason for a drainage obstruction may be that the nasolacrimal duct narrows or the lacrimal sac is inflamed. An innate occlusion of the nasolacrimal duct can also be behind it.

If the non-running tears accumulate in the lacrimal sac, germs that cause an inflammation of the lacrimal sac (Dacrozystitis) can settle.

Decreased tear formation leads to punctate opacities of the cornea and epithelial depositions.

Bloody tears can be caused by poisoning (muscarine or alkyl phosphates).

Also good and malignant tumors of the lachrymal gland are possible.


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