What insight do you gain when you see a frontal pic with the eyebrows lifted high so that the creases show?

The frontalis muscle is responsible for the folds on your forehead and it gives me anatomic location for where the juvenile hairline belongs, as it usually hugs the highest crease and is concave. The mature hairline is one finger breadth above the highest crease in the midline and then establishes a gentle V- Shape so I can tell if the changes are maturing or recession and how much recession.