[Steely Tom]

I guess I was thinking of what was called “op-art.”

Of course, back then those terms didn’t have too much currency, they were too new.

I think I first read the word “psychedelia” as an art genre sometime in the 1970s, like ‘74 or ‘75. Of course, I was in my late teens then and hadn’t seen too much of the world.

[Albion Wilde]

I guess I was thinking of what was called “op-art.”

I agree; the picture you used combined elements of both, but is closer to Op Art. Actually, it's not really "art", but a graphic design or illustration, and not a very good one. The range of images below should give you more of a comparison:

Images of Op Art

Images of Psychedelic Art