U have not mentioned the time..since you are having this watering..the watering in the eyes can be due to multiple reasons..that includes due to excessive use of digital media as mobile or laptop or other ocular diseases. Watering in one eye only can occur in some ocular diseases as dacrocystitis and few other conditions..so it's proper Evaluation is required to manage it.

Are you a regular computer user?if so you are likely to develop computer vision syndrome and dryness. As your age suggest,you might be developing presbyopia. Please put some lubricant eye drops And Get your refraction done.

If no redness/discharge/pain/change in vision and if you’ve been spending many hours using any electronic screen it’s likely to be dryness of the eyes. If any of the above symptoms are present then it could be an infection in which case you should consult with your local ophthalmologist. In mumbai you may contact our center - Arete Clinics for more help.