Watering eyes occur if too many tears are produced or if they cannot drain away properly. The problem can affect anyone, but it's most common in young babies and people older than 60. It can cause blurred vision, sore eyelids and sticky eyes.
A problem with the glands
Glands in the eyelids (Meibomian glands) normally secrete an oily substance that slows the evaporation of tears between blinks.
When these glands don't function properly, known as Meibomian gland dysfunction (MGD), it can result in dry patches on your eyes. These become sore, and extra tears are produced as a reflex. This is the most likely cause of watering eyes.
When your eyes are exposed to substances like pollen or mold spores, they may become red, itchy, and watery. These are symptoms of allergic conjunctivitis. Allergic conjunctivitis is an eye inflammation caused by an allergic reaction to substances like pollen or mold spores.
The inside of your eyelids and the covering of your eyeball have a membrane called the conjunctiva. The conjunctiva is susceptible to irritation from allergens, especially during hay fever season. Allergic conjunctivitis is quite common. It’s your body’s reaction to substances it considers potentially harmful.