The streets are wet here from melting snow so we will not venture out this evening and will have to wait awhile before I can test again the fogging protection afforded by the safety glasses over my regular riding sunglasses with the optical inserts.

After reviewing, discussing, and implementing "Jim from Boston" safety glasses technique I began to vaguely remember another source for this technique. I am not sure how current IceBike.com is but they do have a lot of good information on all things related to cold weather riding. I found this: http://icebike.com/Clothing/Ctestedonice.htm
Go to the very bottom of the page to view the visorgogs.

This is a current link to a source for this product. If you don't already have safety glasses this is an inexpensive option. I am considering these since they are so inexpensive and have an adjustable strap.

http://www.amazon.com/Visorgogs-Viso.../dp/B0018AGDXO