I have MS for 17 years and was recently diagnosed with hypothyroidism and put on synthroid. I am having fogginess-and lessened color vision in one eye since starting the synthroid 2 weeks ago. I have been to an opthamologist this past week and he says my optic nerve is not swollen but it is somewhat pale. My eyes does a little better when I first wake up in the morning- but as i get moving it gets harder to see. I really dont know what to do. I am worrying that this could be optic neuritis, glaucoma, or even a brain tumor. What should i do?