As a matter of fact, using too much kindle fire will really give rise to eye strain more or less. As we all know, the longer you face with the screen, the more radiation you will suffer. And exactly because of the radiation you receive, your eyes become tired and try, which fianlly lead to eye train. For this situation, maby it's a effective way for you to wear computer glasses to prevent eye strain when using kindle fire. Computer glasses are usually eyeglasses with anti-reflective coating that protect your eyes from reflective light from computer screen. So, from this point, computer glasses are good to eyes.Besides, the most essential point is reducing the time you spend on your kindle fire as far as possible.