Here's what was actually happening on those film sets in the 1950s.
Before every single shoot, the makeup artist started with the under-eyes.
They knew what most people still don't: this one small area decides whether a face reads young and awake or tired and old. Get it right, and the rest of the face follows.
So they used something revolutionary at the time, temporary eye tighteners.
These temporary eye tighteners had had film forming silicates consisting of millions of micro-tightening minerals.
And as these micro-tightening minerals dried, they'd connect with one another, forming a film that kind of acted as a second skin. Pulling the under-eye smooth.
These minerals also had a sheer-tint which adapted to their skin, neutralizing darkness.
All happening in under 90 seconds.
Bags pulled flat. Crepiness tightened. Dark circles, gone.