<unk>  refers to an abnormality in tear production that could mean reduced tear production or absent tear production. Because a lack of tears presents in only in a few rare disorders, it aids in diagnosis of these disorders, including Triple-A syndrome and NGLY1 deficiency.<unk>  can be formally diagnosed through a Schirmer's test.
Alacrima
Triple-A syndrome
Desloratadine
Diquafosol
Nalmefene
Rhoeadine
Nifurtimox
Miproxifene