Age Retouching in Photoshop
Among many retouching which can be done, age retouching is one of them and can be compared to skin retouching as well. One of the beauties that retouching have is that you can retouch anything. It all starts from the head to toe. Hence, you can do skin retouch which ultimately transfers the way to age retouch because by doing skin retouch, you are actually making the skin clearer and beautiful which eventually do the task of age retouching.
You can make an 80 year old guy or lady into 25-30 years beauty queen. However, in order to do that, you have to be expert at that and also have to be very good at Photoshop skills because you are doing this through Photoshop.
You do not need to worry much about it though as It is very obvious that when you practice it more, you will be able to master it and can tech others about how to do it as well.