[Disorders of the Lacrimal Apparatus, Part 1: Anatomy, Physiology, Diagnostics].

The lacrimal apparatus is a part of the ocular adnexa preserving ocular surface homoeostasis and therefore enabling sufficiant visual functioning. Tear producting tissues, eyelids and efferent tear ducts operate as one functional unit. Pathologic changes consist of inflammatory diseases, congenital disorders, degenerations and neoplasia. Common to all these conditions is a potential impairment of the ocular integrity as well as a substantial degree of suffering for the affected patients. This review reflects basics of the anatomy, physiology, and diagnostics of the lacrimal apparatus.