I often get sore eyes when I'm sick. Perhaps you have some mild infection? It would certainly explain the fatigue. It could be an odd one, like one of the herpesviruses. An alternative possibility is mold exposure.

Task glasses might give temporary relief of the discomfort. They're just regular prescription glasses that put optical infinity at screen distance. This allows the ciliary muscle to remain fully relaxed.

Consider getting an opthalmologist to look at them, just in case.

As the other commenter said, get your eye pressure checked, especially if this is persistent. That's not something to mess around with.

I'm also curious if you monitor your BP though?

Fwiw, these things helped me a lot. I don't even need eye drops anymore unless I am wearing daily-disposable contact lenses.

* Punctal cauterization

* Vitamin A: 10K IU, taken on five or six days per week (most important supplement for dry eyes) (This takes three weeks to work. Do not confuse with beta carotene.)

* Taurine: 1g bid

* Lutein: 20 mg (naturally derived only, not synthetic)

* Vitamin D3: 5K IU, taken on six days per week

* Fish oil: 2g bid (triglyceride ester version) (provides 1.4g omega-3s in all)

* Generic cyclosporin A eye drops (burns at first for a few months, but then works)

Since you mentioned pressure, get your eye pressure checked annually by a professional, as should everyone. You can also confirm that your eye prescription is correct, although various optometrists are idiots and give a wrong prescription, so be careful. As for your blood pressure, you can use an upper-arm Omron BP monitor to measure it at home.

Note that preservative-containing eye drops can irritate the eye in the long term. Benzalkonium chloride is the worst such offender. Preservative-free lubricant drops exist.