In which conditions would an increase in tears be likely observed?

An increase in tears is likely observed during allergic reactions due to the body’s response to allergens. When exposed to allergens, the immune system is activated, releasing histamines and other mediators that can trigger a variety of responses, including inflammation of the conjunctiva. This results in increased tear production as the body attempts to wash away the irritants and soothe the inflammation. The tears contain not only water but also proteins, enzymes, and antibodies that can help in neutralizing the allergens and reducing the irritation caused to the ocular surface.

In contrast, dry eye syndrome is characterized by insufficient tear production, leading to discomfort and irritation rather than an increase in tear secretion. Similarly, while contact lens wear can sometimes cause discomfort and dryness, leading to reduced tear production or a compensatory response, it doesn't typically result in a significant increase in tears. A corneal abrasion can provoke tear production as a protective mechanism; however, the primary issue during such an event is often pain and discomfort, and while lacrimation may occur, it does not reach the levels typically seen in allergic responses.