1. Determination of tear volume and tear flow;Mishima;Invest Ophthalmol,1966
2. Fluorophotometric measurement of human tear turnover rate;Occhipinti;Curr Eye Res,1988
3. Anatomy and physiology of the cornea and related structures;Bier,1997
4. The lacrimal apparatus;Milder,1981
5. The pH in the precorneal tear film and under a contact lens measured with a fluorescent probe;Chen;Exp Eye Res,1990