Imperforate lacrimal punctum
Tears are produced normally to lubricate and cleanse the surface of the eye. The lacrimal punctum is the opening in the corner of the eye through which the tears drain into the nasolacrimal duct. If the lacrimal duct does not open at the punctum (ie. is imperforate), the tears overflow onto the face and, over time, there is rust-coloured staining of the coat in the corner of the eye. An imperforate lacrimal punctum is inherited in some breeds; however the punctum may become blocked in any animal due to inflammation or infectious disease.
The mode of inheritance is unknown.
There is a chronic overflow of tears onto the face, in one or both eyes. In dogs with light coats, rust-coloured staining will develop over time. There are no other associated problems.
Your veterinarian will flush the nasolacrimal system to determine if an imperforate punctum is the cause of the excess tearing (called epiphora).
Your veterinarian will identify where the punctum should open by flushing the nasolacrimal duct under general anaesthetic, and then make a small incision to open it.
FOR MORE INFORMATION ABOUT THIS DISORDER, PLEASE SEE YOUR VETERINARIAN.