Functional Obstructions of the Lacrimal System

Commentary: The electromyographic analysis of orbicularis oculi muscle in epiphora

“…The simplest description of functional epiphora is “epiphora in the presence of a patent lacrimal drainage system, absence of any demonstrable anatomical abnormality, and absence of alternative etiology.”[ 1 ] It is a complex and underdiagnosed entity. Jones, in 1957, suggested dysfunctions of the lacrimal pump as the major aberration in functional epiphora.…”