Dry eyes are one of the common causes for red and bloodshot eyes. When your eyes are dry they become irritated and inflamed, and inflammation causes redness. Dr. Svetlana Fisher of Specs Appeal Optometry says that while dry eyes are often caused by a dry climate, they can also be caused by looking at a computer screen for too long. Dr. Fisher recommends using artificial tears to help with dry eyes. Also try these home remedies for dry and irritated eyes.