My vision noticeably got worse the last year. I know it's blurry vision and not increased short-sightedness because changing the distance to the thing I wanna focus on does not make me see more detail. It just reduces the noise enough for me to be able to process it. I am thinking it's an aspect of mental fog, or something... when I take my stimulant prescription it reduces significantly as it makes your eyesight sharper, not better.
Staying indoors means I am vitamin D deficient. Have you looked into that? I am bad at supplementing but I think that is the only thing I have left yet to try. Besides going out in the sun and "training" my eye again.