I'm a physicist, so as a fellow scientist I want to apologize because this question will be entirely based on anecdotal inferences and I am well aware how irritating that can be.
I have an eidetic memory and I've never experienced any of the common forms of anterograde amnesia. No blackouts from rapid consumption of alcohol (and believe me, I've tried. That was the fun part. But not for kids; then it's not fun), not from extreme fatigue, head trauma, I even went in for surgery once and the anesthetist said at one point "Well since you asked, the amnesiac should be setting in right about now" and I vividly recall another couple minutes of conversation while we waited for the general anesthetic to knock me out.
So, naturally, I just assumed it must have been because of my eidetic memory. But I've always had an interest in neuroscience and now my curiosity has gotten the better of me. Surely the memory systems of all people are similar enough that amnesiacs and the like should work on everyone. So I ask, are eidetic memories (or perfect, or photographic, or other unusual forms) actually less susceptible to anterograde amnesia? Or perhaps have I just been the victim of probability; this is more a matter of luck not neuroscience?
Please don't spare the gory details, neuroscience is cool (Neuroscientists are brainy guys. Sorry, I couldn't resist that pun). That said, I am physics, not biology; I'm probably under-specifying the question. Let me know if it's too broad and I'll try to focus.