Try a doctor, mate! My right eye is lazy and after 10-12 hours at the PC with almost no breaks, my right eye will get very dry and sticky, like I have pink eye, but there is no pain other than dry skin from rubbing my eye. If I close it for a while, it goes away and all is well again. I recently had LASIK and asked my doc about it, and he said the obvious: "don't stare at the screen for so long."
BTW, my eye gets stickier/worse faster if I'm doing a lot of reading (versus designing or watching videos, etc).
But having pain in your eye is very strange and why a doctor needs to see you! During LASIK, you get no pain meds, just some numbing drops for your eyes, and then they slice into your eye with a scalpel, which you can see (it's disturbing) but can't feel. My point is this: my eyes had flaps cut into them for surgery and there was zero pain during or after. The pain in your eye, to me--and please note, I'm David Bowie's ghost, not a doctor--might actually be behind it, like maybe swelling around the optic nerve (although I suspect you'd have more issues, like blindness, if you had such severe swelling... The worst thing that could happen is swelling that causes the eye to bulge. If you notice your eye bulging, that's an emergency and you need a hospital ASAP).
Otherwise... You could try turning your brightness down, or maybe using the nightlight feature on your screen so that it removes the blue light (my screen has this on 100% of the time b/c the blue light really bothers my eyes, like I'm staring into the sun). I don't think adjusting your screen is going to solve your eye pain, but, well, here's my advice anyway.
Good luck! I hope everything turns out well for you in the end. Sorry for using the phrase 'eye flaps.'
minor edit: I have not gone outside or left my house since January (my last follow-up for LASIK). I don't think going outside or staying inside is the issue (however, do not do what I do. Leave your house periodically).
