If you found that once you turned on the car heat, and the eyes are starting to bother you, it might be dry eyes. It's usually more common between October and April, when the heat is on for the house and the car.
It's best to ask your local Optometrist for precise treatment for the right tears. As you can see here tears are not just made of liquid.
Dr. Yan L. Liang, OD
Contact Warden Optometry to book your vision and health consult.