why does one eye water
Because of this, tears spread unevenly across the eye, leaving areas of the eye unprotected from the open air. This may also be a cause of excessive watering. BananaStock/BananaStock/Getty Images. Problems with the lower eyelid may also cause the eyes to water. One of these, known as ectropion, occurs when the lower lid is too relaxed, causing it to droop and expose the inside of the lower lid.