How does the tear film act as a barrier to toxins?
The tear film serves as a physical and chemical barrier to environmental pollutants, allergens, and pathogens. Its components, such as lysozyme and lactoferrin, possess antimicrobial properties that neutralize toxins and pathogens. Additionally, the flushing action of tears helps remove foreign particles and chemicals from the eye surface. In toxicological assessments, the integrity of the tear film is often evaluated to determine the potential risk of ocular exposure to toxic substances.
