This is an old post but I thought I would share my experience. I have the mthfr gene and got the doses of the Moderna vaccine in June 2021. I ended up with Covid in December of 2021. I recovered fine from it. By Jan 2022, I woke up one day barely being able to see out of my right eye. I had developed a fully mature cataract (doctor gave it a 10/10 of severity). My left eye was bad as well. Now, I had microscopic cataracts my entire life but my eye exam in the summer of 2021 showed they would qualify for surgery but not at the level they were the following January. I had them removed in March 2022. Chalk it up to what you will but I was only 40 at the time of removal. Was it related? I’m not sure but I know that both the vaccine and mthfr are both a risk factor for advanced cataracts.