What are some good eye exercises to relieve tired eyes?

Do this. Take a brief break every 10-15 min and close tour eyes and massage your temples for a few seconds.
Unfortunately none. The feeling of tired eyes is usually related to straining for long periods of time, as well as dry eyes. The best way to help relieve the feeling is to take breaks when working - 5-10 minutes every hour - and to use lubricating eye drops.