Someone just informed me that most of the images in http://en.wikipedia.org/wiki/Eyeglass_prescription have been deleted. These were all my original artwork. Image deletion being what it is, I apparently have no way to review the edit history, but my possibly faulty recollection is that they were all uploaded using what was the proper licensing language at the time; that is, I _believe_ that they all said "Copyright �1998 by Daniel P. B. Smith and released under the terms of the Wikipedia license."
At the time, people were told to use the specific language "terms of the Wikipedia license," not "GFDL."
If this is true, then I am annoyed that the images were deleted without notifying me first, as it should have been clear that they were properly licensed. Yes, I should have remembered to tag them, but whoever reviewed the images could have let me know... or, for that matter, could have tagged them GFDL based on the language in the image description.
Yes, I will reload the images when I get around to it.
I think people deleting images should be requested not to delete immediately untagged images if they say "released under the terms of the Wikipedia license."