My first symptom was when I was in my 1st trimester so I remember exactly when and it was called optic neuritis. When my daughter was 2 I had a relapse and an MRI so that is when MS was diagnosed. I've had small snippets of Optic Neuritis since so I will describe what I experienced knowing that it will not be the same for all. What I had was in my one eye there as a "blind spot" that was kidney shaped and just in the lower left quadrant of my vision. It covered maybe 15% of my total vision for the eye. Because it was just one eye and just a part of it I still tested 20 20 vision and could drive. In that kidney shaped spot instead of regular vision I had a checkerboard pattern in black and white. In this last year I've had two occasions where I had blinky zig zags in my vision or other patterns. They were much smaller and went away within a half an hour. As they were such a short duration and not really bothersome I just noted the date to track frequency and told my Neuro at our next appointment. In all of these "attacks" I had no headache or reasonable explanation why they were happening..that is there was no blow to the head, I hadn't fallen, I had enough sleep, I wasn't dehydrated, I don't get migraines or optical migraines, etc. In that initial attack that lasted for month (and in later tests) they had me do visual field tests (done at U of Mn USA and also my own optometrist) https://www.aao.org/eye-health/tips-prevention/visual-field-testing In this type of test they could define exactly the position and shape of the blind spot. Thankfully the blind spot went away in my 3rd trimester (as many MS symptoms do which is why the hormones of the third trimester may give us clues on treatment drugs) and vision impact after that has been, thankfully, very short lived. I initially called my optometrist as I assumed the issue was with my eye. His exams showed my eye were fine. He is the one that sent me to a neurologist as he said the issue was with my optic nerve...not my eye. And there was no eye pain. I don't know if you have seen an eye Dr but if not maybe that would be a good idea. I also use eye drops as my eyes tend on the dry side especially since Lasik. My Eye Dr sees me annually even after lasik due to my optic neuritis issues and he looks at my Optic Nerve and sees the MS impact but it isn't an issue with the eye...it is an issue with the nerve. Not sure if you have had this same discussion with an eye Dr but sounds like a good step if you haven't. Again- my Optic Neuritis may be different than other experiences

Thank you for sharing your experience.