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.

One can divide lacrimal drainage system tests into functional and anatomical evaluations. The functional (physiological) tests are designed to assess tear flow under natural physiological ...

Although epiphora can be due to either excessive tear ... Using a metal cannula may damage the lacrimal sac and nasolacrimal duct; a safer alternative is a soft Teflon catheter (Fig.

The lacrimal glands are above each eyeball, towards the outer part of the eyelid. The glands produce a fluid that cleans and protects the surface of the eyelid. Tears are part of this fluid. A growth ...