What are nose discs? What is their purpose?

Question

That wikipedia article is where I found the term and why I'm asking what it is. Wiki doesn't have an article defining
nose discs, they just mention it in the Judy Garland article.

Answer 1

There are these:
http://www.gulfrubber.com/mining/
For impact cushoning.

There are these:"
http://en.wikipedia.org/wiki/Judy_Garland
The tip of your nose has a nose disk in it.

And these:
http://www.onr.com/cabeceras/sec8nwr.htm
http://cellar.org/2003/holewoman.jpg
http://www.art-pacific.com/images/shellsa.gif
Actual 'disks' as jewelry.

And this:
http://www.sabbathlive.com/gallery/pics/album511/One_For_The_Nose_disc.jpg