The product may be used to treat a condition that the American Academy of Ophthalmology says affects around 20 million ...

Many causes of epiphora are unrelated to anatomical problems in the nasolacrimal drainage apparatus. Problems in the upper lacrimal system have often been under-recognized as a cause of epiphora.

The second layer is the intermediate aqueous layer; this layer forms the majority of the tears and is derived from the main lacrimal gland with minor contributions from the accessory lacrimal ...