- ►nih.gov [PDF] NJ Van Haeringen - British Journal of Ophthalmology, 1997 - bjo.bmj.com The reflex secretion of tears, as measured by Schirmer's I method (without
anaesthesia), decreases significantly with increasing age as already was
observed by Schirmer in 1903 and by many others thereafter. The age groups ... Cited by 18 - Related articles - BL Direct - All 6 versions