Under-Eye Hollowing
the tired look that's mostly anatomy, not your sleep schedule
Grounded in the research on Wikipedia: Tear trough; periorbital dark circles
the look
Under-eye hollowing is the shadowed groove between your lower lid and cheek, the tear trough. The skin there is the thinnest on your body and sits over a ligament that tethers it down. When the fat pad above sags or the cheek below deflates, that tether casts a shadow. Looksmaxxing forums call it the difference between looking rested and looking permanently exhausted.
one layer down
It's anatomy, not lifestyle, mostly. The orbital septum holds fat behind your eye; with age or genetics it bulges or descends, and the tear-trough ligament creases the skin into a valley. Dermatology literature (the term tear trough traces to oculoplastic surgeon Sterling Baker) is clear: shadow plus translucent skin showing the muscle underneath reads as a dark hollow. Sleep barely moves it.