Hello I mentioned previously that after changing from thyroxine to natural thyroid I found I could see on the dark much better . I was diagnosed with glaucoma 6 years ago having been on thyroxine for 6 years before that. Since changing to NDT the pressure in my eyes has come down . I asked of it was related to thyroid or thyroxine but this was quickly dismissed . However I think it is . No one in my family has ever had glaucoma by the way.