I have a blind spot you might ask? Yup, we all do. Check out the article on wikipedia if you want to find out more. This test will help you discover yours. Close your left eye and focus on the smaller static circle on the left. At some point the big circle will disappear as it goes into your blind spot. It didn’t happen for me at first which just means I was sitting to close/far from my monitor. Try sitting closer/further to your screen and repeat.