Infections could be possible, also allergies. Mold toxins affect many people - look for places where mold might be growing in your living area - under sinks in damp spots in walls, damp rugs. It might help to take increased Vitamin C. My eyes react when I eat foods that have even a small amount of molds and many commercial foods do, especially nuts or fruits with even a small brown spot. It may help to find an eye support supplement, they usually have rutin, Vit A and herbs to increase circulatin to the eyes.