Tired eyes tend to be very visible to the public, as they are often red, and puffy or swollen, or can even be bloodshot! This is a really very simple eye exercise that you can do while the at efforts. http://nhagiaobuibachlien.net/music/index.php?language=vi&nv=news&nvvithemever=t&nv_redirect=aHR0cHM6Ly9Xd3cuVGhlcmFsaWZlLmNvbS8