As far as I am concerned, there are three ways for to make your eyes look more shiny without makeup. First, you can use whitening mask and cleaning mask once every week. When you look off color, your eyes will not appear vigor as well. So taking care your face will help your eyes look shiny. Second, the reason why your eyes don't appear vigor is maybe because you have bag eyes or there is too much melanin around your eyes. To solve this problem, you should smear sun cream on your face and use some whiten eye cream to get rid of eye bags or melanin when you go out. Third, you should have good habits such as getting up early and going to bed early as well, avoiding eating cold drink and son. I must remind you that it is a long run for you to have a shine eyes. When you really take care of your skin, you gains. Taking care of yourself is the best solution.