When the eyes started going I used the flip up's that attached to my regurlar glasses for tying.
http://www.cabelas.com/p-0024296711125a.shtml

Then I found these at the local Micheal's and really like them. http://www.mageyes.com/Hobby.htm
They are light, swing up and down easily and have enterchanable lenses from 1.6 to 2.75 magnification.
GJ