TEAR FILM, PHARMACOLOGY OF EYE DROPS, AND TOXICITY

Contributions to the literature concerning physiology of the lacrimal glands, production of tears, structure and function of the tear film, dry-eye states, the effects of eye drops, and toxic effects on the ext ernal eye have continued to extend our knowledge concerning these impo rtant processes. In recent years, the intimate association between the tear film and the ocular surface has gained increased recognition. If not for the untoward effects of dysfunctions of the lacrimal secretor y apparatus on the ocular surface, there would be very little interest in the secretion of tears. Tears, however, play an important role in the maintenance of a healthy ocular surface, in the protection against disease and injury, and in repair processes.