Me on 29 Oct 1993, about 10:45pm outside of INPO. The third eye was made from a pingpong ball and painted with nail gloss and makeup. I discovered that neither spirit gum nor latex will stick to pingpong balls, but adhesive tape works great. For the lids and surrounding flesh I used paper towels. It looked fairly realistic from up to a few feet away. Of course, the eye didn't move. You can see Jon Krivitsky in the backround in his "Masking Tape Man" costume (aka "$2.38 Costume Man"). I don't remember who took this picture, but I'm glad I have a copy.
For a good tale of woe, ask me what happened with the spirit gum that evening.