When you focus on refractions, it is because you have a problem with your vision. You can see the world through different ways and that's why refractions are important. Go to this https://flashessay.net/ site for more help. If I look at my hand and then at the window, I may see that both my hand and the window are in front of me. However, if I focus on refractions, I can see that my hand is behind the window.