What symptom is commonly associated with keratitis?

Increased tear production is commonly associated with keratitis because this condition involves inflammation of the cornea, which can be caused by infection, injury, or exposure to irritants. The cornea becomes irritated, leading to a reflex increase in tear production as the body attempts to soothe and protect the affected area. This response helps wash away debris and provides necessary moisture. Symptoms of keratitis often include pain, redness, and watery eyes, making increased tear production a significant indication of the condition.

While swelling of the eye may occur with certain types of ocular inflammation, it is not the defining symptom of keratitis. Decreased sensitivity to light can also be associated with eye conditions but does not specifically indicate keratitis. Heart palpitations are unrelated to this condition and are associated with cardiovascular issues rather than eye disorders. Thus, increased tear production stands out as a direct and relevant symptom of keratitis.