1 day post PRK surgery. Can I use warm compresses on my eyelids for the swelling?

First of all, I would recommend that you return to your PRK doctor, or at least an ophthalmologist or optometrist, rather than urgent care, which are not eye doctors. But getting elbowed should have no long-term effect on your PRK results.

Advanced Surface Ablation is a variation of PRK. I would expect little further change 1.5 years after treatment. Most likely, there is some astigmatism which could be corrected by another treatment. Maybe a second opinion is in order.

Hyperopic PRK corrections will require more time to heal compared to myopic corrections, so it may take up to 3 months for vision to be very sharp. To speed up your healing, I recommend using preservative free artificial tears every 2 hours, getting plenty of rest, 1000mg Vitamin C daily, and s...