The tear trough is a groove on the face that runs from the inner corner of the eye to the bottom edge of the nose. It is one of the main elements of facial anatomy and plays an important role in the functioning of the lacrimal glands and nose.
The tear trough has several functions. First, it provides a passage for tears from the tear ducts into the nasal cavity. Tears collect in the lacrimal glands and pass through the lacrimal canaliculi into the lacrimal sac, which is located in the lacrimal duct. The lacrimal sac opens into the lacrimal canal, which passes through the lacrimal trough and exits through the nasal opening.
Secondly, the tear trough provides protection for the eyes. It protects the eyes from mechanical damage such as impacts or scratches due to its dense structure. In addition, it helps to retain tear fluid inside the eye, which prevents it from leaking and keeps the cornea hydrated.
However, the tear trough can be susceptible to various diseases. For example, infections of the tear ducts or nose can lead to inflammation and swelling of the tear trough. In this case, pain and discomfort may occur, as well as difficulty in the passage of tears.
In addition, the tear trough is an anatomical landmark for various cosmetic procedures such as Botox or filler injections. It is important to note that the tear trough cannot be altered surgically without the risk of serious complications.
Overall, the tear trough plays an important role in facial anatomy and physiology. It provides protection for the eyes and allows tears to pass from the lacrimal glands into the nasal cavity. However, the tear trough can also be susceptible to diseases and cosmetic procedures that can lead to complications and discomfort.