Lacrimation abnormality Decreased lacrimation Hypolacrimia As part of the lacrimal apparatus, the lacrimal gland participates in the maintenance of a healthy eye surface by producing the aqueous part of the tear film. Alacrimia and hypolacrimia, which are relatively rare during childhood or young adulthood, have their origin in a number of mechanisms which include agenesia, aplasia, hypoplasia, or incorrect maturation of the gland. UMLS:C0235857 Abnormally decreased lacrimation, that is, reduced tear production. Decreased tear secretion HP:0000633