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.
Lacrimal fluid is part of the process of cleansing and wetting the eye, as the blinking of the eye washes the eyeball in the necessary tears. The lacrimal puncta is found on either side of the lacrimal caruncle, and represents the two small drainage vessels required.ach lacrimal gland of each individual eye is known to produce about 1 milliliter of lacrimal fluid in a 24 hour period. Aggrevating substances cause greater amounts of fluids, such sand, dust, pollen, or onion, as the conjunctiva requires greater amounts to remain moist.