My left eye has been watering for about 3 or 4 days now. It's not painful or red, but just keeps tearing up. It's getting really annoying now, as if I don't keep catching the tears they will eventually roll down my cheek. I do wear contact lenses but am not at the moment (the eye doesn't feel any different if I wear them or not - it still tears up, but isn't sore).
What could be causing this? I'm trying to decide whether to see my optician or try some eyedrops from the pharmacy first.