ARCHIVES OF OPHTHALMOLOGY, vol.118, no.10, pp.1381-1385, 2000 (SCI-Expanded)
Background: It is frequently stated in the literature that there is a common canaliculus (CC) in the lacrimal drainage system in about 90% of individuals; in the remaining 10%, the upper and lower canaliculi enter the lacrimal sac separately. To our knowledge, there is no quantitative study supporting this assumption.