I have issues with my eyes. Convergence, tracking, fatigue like you describe. I have had 30 weeks of vision therapy, have prisms in my glasses and wear tape on the lenses.

The doctor gave me basic over the counter drops called Systane to put in my eyes twice a day and moist heat for 15 minutes to help with the eyes aching. The moist heat seems to help gives me a quiet meditation time as well.

I still have ten weeks more of therapy. Improvements are slow and it is discouraging to not see much improvement. The aching in my eyes does feel better.