Quantitative evaluation of canalicular flow using lacrimal scintillography

Abstract

Lacrimal scintillography is now a recognized technique for the evaluation of lacrimal excretory physiology and pathology. Computer interfacing makes it possible to measure the time required for half the radioactivity to disappear from an area (Tl/2 value). These techniques have been used by several authors to quantitate normal and abnormal lacrimal outflow (Hurwitz et al, 1975; Doucet et al., 1982).