I’m not sure about the UV light portion of this article, but I haven’t noticed eye strain since I’ve repositioned my monitor, which this also brings up. For a couple of years I would notice that occasionally throughout “crunch times” at work I would wake up (and go to sleep) with near-nauseating aches in the back of my eyes. Eventually I identified it to looking _down toward_ my monitor/phone rather than _forward to_.
Also, I was extremely active until my mid-twenties; skateboarding, running, resistance training, etc. but over time the passion for what I did became my sole priority and I gained a bit of weight as a result. That, coupled with poor posture at my desk (slouching for days), laid bare some old lower back injuries that I didn’t even know existed. After tolerating it for almost a year I got an MRI and confirmed my lumbar region was in a decent state of atrophy, which was leading to near-constant pain.
I had two options: maintain my current lifestyle or start moving around more and tighten up my lumbar region’s musculature to quell the pain. I chose the latter, lost weight, started a morning routine again, and now I rarely feel pain.
TL;DR: Eventually your body will find something wrong with your desk job. Be proactive and give it what it needs before you’re forced to.