Hi there. I suffer with anxiety as well. I have noticed that when I am feeling even a tad bit anxious, my eyesight seems worse. I am constantly thinking that I have something wrong in my brain and that is what is causing me to go blind slowly.
I ended up going to my eye doctor and my eyesight has not changed at all in the past year. I think it is just anxiety that makes us think our vision seems worse. But, it never hurts to go get your eyes checked. It might make you feel better, mentally.