I'm new to this forum, but I wanted to say that I've been in the same boat as many people here. I've had baggy eyes despite sleeping well, a lot of eye strain from computer use, etc, etc. My eye doctor talked to me about the "trigeminal nerve strain." Fortunately he actually had a testing machine that can measure that strain. He gave me the full break down, showed me the numbers and the data as a result of my testing. Neurolens had a money back guarantee, so I bit the bullet. First couple days I was slightly nauseated because I've never worn glasses before. Day 3 and on it's been heaven. I can look wherever I want, all the time! Downside is if I take them off, my eyes immediately start hurting again unless the lights are off and I'm focusing on the other side of the room.
My eye doctor also has a therapy option with a high success rate. In the next year or so I may try that so I can eventually get away from needing the glasses. I got curved monitors with VA panels and high hz, and that has been helpful as well (albeit anecdotal).
What it comes down to, and I think nobody likes to hear this, but eyes are complicated. Phone, TV, and Computer screens are a contributing factor. Other factors include your general health, how close those devices are to your eyes, how much work your neck is doing if you're regularly looking down instead of straight ahead. For me, the further I got through my days the harder it was to focus on anything close. I couldn't look people in the eyes during conversations simply because it hurt, and they were too close to my eyes.
Neurolens are not inexpensive, and they won't be for everyone. But if you have the budget, they have a money back guarantee within the first several months to a year (don't remember exactly). Alternatively, therapy is an option. Also studying and practicing display ergonomics, learning proper stretching and exercises for both your eyes and your neck/back. What I'm mainly hoping to portray is that it's not all in the LEDs.