It's quite a normal situation for the majority of people, specially for people with air conditional open at home after work. And there are various measures to solve your problem. I am willing to recommending a few effective ways to you. There is a measure operate quickly, just put some eye drops in your eyes, which will do the deed soon. However, it is not a good way to eyes for long run. You can also always place a cup of water in your desk to increase the humidity in the air around you, thus to keep eye moist. Meanwhile, keep drinking will also helps. Just have a try, and i am sure these above measures will help to relieve that sense. Thanks for reading.