Epiphora (medicine)
| Classification according to ICD-10 | |
|---|---|
| H04.2 | Epiphora |
| ICD-10 online (WHO version 2019) | |
As Epiphora (Greek), epiphora or Runnyeye is known in medicine from leaking tears over the eyelid margins . It is an expression of a disproportion between the tear production in the lacrimal glands and the drainage via the draining tear ducts . Loss of tears is a symptom of numerous eye diseases.
The trickle of tears was already familiar to medieval ophthalmology and offered the oculists of that time, wealthy patients, a good source of income.
causes
Tears can be caused by an increased production of tear fluid ( dacryorrhea ), as it occurs above all with mechanical irritation of the conjunctiva , cornea ( foreign body , entropion ) as well as with irritation of the trigeminal nerve , sinus disease or hypertrophy of the tear gland .
A second complex of causes relates to disorders of the drainage of the tear fluid through the draining tear ducts. In particular, congenital or acquired constrictions ( stenoses ), but also misalignments of the tear points due to degenerative or congenital diseases of the eyelids can be responsible for this. With this complex of causes, particular attention must be paid to the possibility of congenital glaucoma in children .
Veterinary medicine
Genetically determined eye discharge through underdeveloped nasal tears occurs as a result of neglect in breeding selection in some dog breeds. The bacterial discoloration of the secretion can be seen more clearly in white dogs than in dogs with brown or black fur on their faces.
See also
Individual evidence
- ↑ Gundolf Keil : "blutken - bloedekijn". Notes on the etiology of the hyposphagma genesis in the 'Pommersfeld Silesian Eye Booklet' (1st third of the 15th century). With an overview of the ophthalmological texts of the German Middle Ages. In: Specialized prose research - Crossing borders. Volume 8/9, 2012/2013, pp. 7–175, here: pp. 15 and 57 f.
- ↑ http://www.tieraugendoc.at/wissenswertes/tr%C3%A4nendes-auge-epiphora/
- ↑ Veterinary portal: Epiphora eye discharge in dogs