Again:
If you're distracted by them, then you're not who they were designed for.
As for whether or not they're effective? They're use reminds me of an interview with Jim Carrey around the time of "When the Grinch Stole Christmas," where they brought in a specialist in resisting torture to help the actor with his heavy prosthetic makeup.
https://www.youtube.com/watch?v=kXAv8RXmsrc