Sore right eye

I had both cataracts removed, the last one being early November. Had the lenses that mean I don't need to wear glasses all the time . However I have a slightly sore eye, I think its the eye itself and not the eyelid but not quite sure. I'm using some drops for dry eyes which I used to use when I wore contact lenses but is there anything over the counter which you think might help. I remember my mum using golden eye ointment on styes but I don't suppose you can buy that now.