Bickerstaff's encephalitis is a rare inflammatory disorder of the central nervous system, first described by Edwin Bickerstaff in 1951. It may also affect the peripheral nervous system, and has features in common with both Miller Fisher syndrome and GuillainâBarrÃ© syndrome. 1  1 Signs and symptoms.  2 Pathophysiology.
Pathophysiology. Tears are produced in the lacrimal gland and drain through the upper and lower puncta into the canaliculi and then into the lacrimal sac and nasolacrimal duct (see Figure: Anatomy of the lacrimal system. ). Obstruction of tear drainage can lead to stasis and infection.
The Lacrimal gland is responsible for the production of tears.  There are two of these glands, located above the outer corners of  each eye. While these glands produce tears â¦ , there is a series of  ducts, canals, and sacs that help transport the tears. A tear gland is located near the eye, in the eyelids; which produce lipid, lacrimal and mucoid layers of the tear film coating, which coats the anterior surface of the c â¦ ornea.