Missed this one Parker, found it while searching for something else.

For the record, the bright flash photography has no lasting damage on the retinal photoreceptors, just bleaches them out temporarily. I do it repeatedly on a daily basis on human subjects.... burn an entire roll of 36 exposure B/W film plus 8-10 color slides in about 10 minutes for one patient each time I perform a fluorescein angiogram to evaluate retinal disease.