This is NOT medical advice, but have you had any major traumas or stressors in your life? If you have a normal eye report but are experiencing vision loss, perhaps talk to a psychologist to so if it could be conversion disorder. The symptoms are rooted in a psychological nature, but it is very very real to the person experiencing the disorder. Therapy would be required to work through trauma if that’s what it is. If you’ve checked with the eye doctors (and you have) that might be the next step.
Also, I would ask the ophthalmologist if they can perform a perimetry test. Even if he’s looked at your optic nerve and retina and seen no damage, a perimetry test could help get an idea if you really are experiencing visual field loss or if it just feels like you are. That would be good information for you to have.

Color went first, about four to five years before I got diagnosed I started arguing about color with my mom, would claim something was black when it was really blue, then everyone would act like I’m insane for thinking it was black. Peripheral was the next to go for me. About three to four years before I got formerly diagnosed, I started sensing I was loosing it and would just hold my fingers on the side and see how far they’d have to be before I could see them. Then I started doing it to my siblings snd friends who obviously could see their fingers way before I could. Then night night vision was the next go, I realized i struggles with walking in the dark, especially because I lived in the city so I was walking around at night im crowded areas a lot.

But here’s the thing, I didn’t get diagnosed till years later, these diseases sometimes have extremely slow onset. But if you really feel like your field of vision is closing in, then they would be something they could see with that annoying field of vision test. Plus, an eye scan would likely catching any swelling that could cause it.

I would relax! While I understand your fear, you’re likely making it worse by being nervous. As hard as it may be, trust the doctors and get yearly check ups to monitor it and go from there.