1. Weil B.A. and Milder B. The lachrymal system, Appleton Century Crofts, Norwalk, CT, USA.
2. Contact Lens Practice;Ruben,1994
3. Contact Lens Practice;Ruben,1994
4. Buffering in human tears: pH responses to acid and base challenge;Carney;Invest. Ophthalmol. Vis. Sci.,1989
5. Effect of age on tear osmolality;Craig;Optom. Vis. Sci.,1995