Keep in mind the following general advice. Finding high quality eye protection in certain countries can be difficult so bring your own, particularly if you require it for your job. Bring written copies of the prescription in case you're stopped by Customs. When you see your eye doctor, let her know that you plan to travel internationally and follow her advice. Consider using artificial tear drops, in flight, to keep your corneas moist and avoid red, tired looking eyes.
Many ophthalmologists recommend avoiding drops that contain tetrahydrozoline.
In certain parts of the world this may require some planning. Remember, a dry, irritated eye is susceptible to infection. If you wear disposable lenses, the end of a long flight is a good time to toss them. Talk this option over with your eye doctor. Tired Eyes Don't overdo reading and laptop computer work.