I had the appearance of the first floaters a few years ago. I first
noticed them in a sunny environment in summer at the end of a few weeks
I spent at the open air (usually I stay in house most of my time).
Ophtalmologist says "vitreous degeneration". I was 25.
That would be "vitreous liquification" (syneresis) I guess.

Can syneresis be caused by light? The ophtalmologist said that it can be
caused by UV rays. If it can be caused by UV then probably also normal
light can cause this, to a lesser degree, is it correct?

I am worried because I found I suffer from depression from light
deprivation. The natural cure would be a light-therapy lamp: those do
not emit UV however they still emit a lot of visible light and have to
be used 30min/day forever (30 min/day of light is an enormous amount for
my standards: I am a dungeon man). I am worried I could develop more
floaters with light therapy, and that would not be good even for the
depression :-(

Thanks for your feedback
noname