Well, yes, tea bags can be good for tired eyes. Generally speaking, when you have overused your eyes in a long term, it will just increase your eye strain. And then, tired eyes may occur. At this moment, some other symptoms such as itching, burning, swelling, watering eyes can be possible too. According to some experts, you can make tea bags cool and then apply them on your eyes. And then it can be effective, for cool tea bags contain a lot of nutrients, it can help to relax the eye muscle and then, tired eyes can be relieved. Also, heating a piece of garlic will work wonders if done right. And then you can just put heated garlic on eye and hold until garlic cools. And then just repeat the process for a while. anyway, just have a try.