Can you tell us where in settings that is? Thanks!
Cool thought. Imagine not a mod, but an in game elixir. The person who drinks it can see their character glowing bright colors for 1 hour. Herbalists can help all of us with bad eye sight and wear glasses. And alchemists can help as well.
Also the elixir only shows its effects to you and no one else, but everyone else can see it in your buff bar.