I am a good 10 handicap golfer but why at impact is my irons rising and not descending through the ball?

i had this same problem. what was wrong with me was i was looking to see where the ball was going to early (pretty much raising my head), and that lead to my shoulders raising up, which lead to not staying down on the ball which leads to bad shots. so just keep your head down and stay down on the ball. and like a previous answerer said, your ball could be to far forward in your stance, it needs to be in the middle but im sure you know that. hope this helps