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1 Data on File. Bausch & Lomb Incorporated. Rochester, NY.

2 Hirase et al. Age-related alteration of tear dynamics in normal volunteers. Nihon Ganka Gakkai Zasshi. 1994 Jun; 98(6):575-8

3 Bergmanson, Jan, Clinical Ocular Anatomy and Physiology, 14th edition, 2007.

4 Brennan, Noel A., Beyond Flux: Total Corneal Oxygen, OPTOMETRY AND VISION SCIENCE , 2005; 82(6):467-472

5 Data on file. Bausch & Lomb Incorporated. Rochester, NY.

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