The constriction (stenosis) of the lower lacrimal point is one of the frequent causes of persistent lacrimation. About narrowing of a lacrimal point it is possible to speak at its diameter less than 0.1 mm.
Dacryocystitis is an infectious inflammation of the lacrimal sac, which arises from the obstruction of the nasolacrimal canal, which is usually caused by staphylococci. There are acute and chronic course of dacryocystitis.
Inflammation of the tubule (canaliculitis) often occurs secondary against the background of inflammatory processes of the eyes, conjunctiva. The skin in the tubule area becomes inflamed. There is marked lachrymation, mucopurulent discharge from lacrimal points.
Diseases of the lacrimal gland (dacryoadenitis) are rare, often on the one hand. It arises as a complication of common infections - influenza, acute respiratory infections, tonsillitis, mumps, scarlet fever, diphtheria, etc.
In the normal state of organs, tear production corresponds to shedding. If the mechanism of lacrimation is disturbed, or if excessive tearing is observed during normal shedding, then in both cases a tear will roll over the edge of the lower eyelid - the so-called lachrymation.
Blepharospasm is a spasm of the circular muscle of the eyelids. Blepharospasm arises reflexively in diseases of the cornea. It is especially pronounced in children with tuberculosis-allergic keratoconjunctivitis. Eyelids convulsively compressed, the patient is unable to open them because of photophobia. With prolonged spasm there is a stagnant swelling of the eyelids.
Infection with specific infectious mycoses, including especially dangerous fungal infections (histoplasmosis, blastomycosis, moldy fungal infections), accompanied by severe sensitization.
