Ronans Night Terror

My son gets night terrors. He can be looking right at me and does not know I am there. He just screams. I wanted other people to see this so it can help to identify if their child is going through anything similar. He has these terrors several times in a month. They usually last 310 minutes. I have noticed that letting him do this without my intervention seems to work the best. If I touch him he will carry on even more.