@ 8_octaves - prima vista ( or close to it)
Closer to prima vista, but if you have properly prepared there is little pure pv.
@timothy42b : Hi timothy, yes, I have...

Hi j_menz, and timothy, too: Thank you for the answers very much!
And normally, I would, now, ask "how close", since the expression "close" is not very exact in the field of "sight reading", I think. Here we (or at least the people who are interested in it and like sight reading very much, as do I ) are interested in very much more exact differentiating.
Additionally, unfortunately nobody on an internet-forum can prove to 100% that something is played by him "prima vista".
But I won't
in reality dare to ask the question to you: "How close..." .
This has the following reason:
Many years ago, when I bought 2 books of sheetmusic simultaneously (Peters, and Dover), I did this because I knew the "Banjo" op. 15, of Gottschalk. I had heard it on TV, and since then, this composer was my life.
I went home, and played 4 or 5 times (which means: days, since I completely played through each piece no more than once a day) through the COMPLETE Dover-Book (in which 26 works of this composer are ) ( in the Peters-book, are only 8 pieces, which are in the Dover-book, too ) . -
I had known only the "Banjo" (op. 15-version) before, and not the other works. So, the "Bananier", too, was a piece I never had heard or seen before.
And I recorded the "Bananier", the recording I started was when it had been the 4th or the 5th time I was playing it from the sheets during the mentioned 4-5 days - ( which also means: times, for each piece, because, e.g., the Dover-book is voluminous! ) playthroughs.
This version I have attached ( or try to attach ) here as mp3.
Piano: It's my own one, at home, and a cheap one, but in former days it was OK, I think. Today, since I haven't had it tuned for years now, its sound wouldn't be appreciated too much. So I don't (yet) directly upload or link other works played on it recently here, i.e.: works, which I only had seen or played through very few times before I recorded them while playing them from the sheets, too.-
To my "personality as a sight reader":
If forced

, or challenged

, I can learn pieces "by heart", too, and I can play, by heart, some pieces which are easy, some which are intermediate, and some, but few, which are hard.
And sometimes people (friends, or others) challenge me to play from sheets. That's super, and a lot of fun, when my friends do that here at home. But it can be VERY dangerous for me,

( since I am, as I said in the Granada-thread, autodidact and never had formal training or a piano teacher, ) , but for them, who would challenge me, for example in an unfriendly manner, it could be VERY dangerous, too,

because I am able to counterattack hard and without compromises, by challenging THEM.-
Now, because Music shouldn't be supposed to be the basis for "piano battles" (as I mentioned in Thalberg's nice 10-years' jubilee-thread ) , the much more preferrable way to cope with Music in a community, is friendly conversation and informative postings.
@Sight reading versus memorizing:
For my subjective and personal "in-house-use", or playing together with friends or relatives, it's much more important for me to play new pieces as good as I can from the sheets, and then looking at other, new pieces. And this improves, today, since I'm accustomed and experienced to play from sheets very very many pieces.
I, meanwhile, have 30 years experience in prima vista (narrowest sense of word) and, CONNECTED to it, the "close to it" sense of word. As I mentioned in the "Granada"-thread in the audition-room, I was spotted as a good (my mentioned music-teacher said: "very dangerous / marvellous" ) prima vista / and sightreader.
I'm lazy and don't practice via "etudes", and I very rarely do really intensive practicing. But even then I ONLY would practice directly at the work I want to play.-
BTW.: This recording of the Bananier I later sent to my friend in the USA, who liked it, but criticized ( "I disliked...", he wrote.. ) , that I played too fast, which led to a nice, and amusing discussion, at the end of which we came to the conclusion:
"Banana- Trees ( and Banana-men, who trade Bananas, since that's a rare, but existant definition or association for the "Bananier", too, as some might know ), don't run quickly through the landscape!"
And now: "En avant, Grenadier(s)!"

(Which is a version of the French text of the creole song, which may be the basis for "Le Bananier!"
Very cordially, 8_octaves!