Staring at computer screens or your mobile phone and tablets for hours or reading in low light are some of the common causes of tired or fatigued eyes. Lack of sleep or a faulty vision prescription can also lead to a lot of strain on the eyes, leaving them tired and, at times, puffy. Blurred vision, headaches, irritation and itchy or watery eyes are some common symptoms. Instead of opting for medication, all you need is a few simple tips that you must follow everyday to prevent fatigue and relieve your tired eyes.