The last 9 years i spend 8-10 hours everyday infront of my computer. My vision was bad because of that (left 20/50, right 20/40).
Exactly 20 days ago i quit my office job. Now its just 1-2 hours a day infront of computer and i use these glasses that simulate distance vision when using my computer. The rest of the day i'm outside.
I checked the snellen chart today. Results: left 20/40, right 20/25. Sometimes even better.
So in my experience is that if you spend over 90% of your day in distance focus mode with sunlight your myopia will improve.