Yes it is. It even gets mentioned in the novels. Watch out Turn Coat spoilers! In "Turn Coat", in one of the instances when Harry enters his apartment to find Morgan, Mouse, Molly and Lucio all tangled up, Capt. Lucio states, that Molly blinded her. Molly defends herself by stating that she didn't blind Lucio, but veiled everything that wasn't her. Then Lucio tells her of for it, stating that it is an unreasonably complex way to do it. Molly answers in saying that it isn't complicated for her to do it (witch is absolutely astonishing if you ask me).
So it seams that you can blind some one by veiling things from them. In game terms I'd treat this as flavor. It would just be a blinding maneuver through evocation like every other. The description is what counts here. I don't see any advantage for doing a blind through a veil, nor do I see a disadvantage.
A variation on this concept would be the SEP Field ("Someone Else's Problem" Field), found in Hitchiker's Guide to the Galaxy, replacing cloaking devices. You remain plainly visible, but nobody notices you because a tiny bit of their brains determines that you are someone else's problem, and therefore refuses to acknowledge you in any way.
The problem with this, though, is that it is probably a violation of the Laws, given that you are altering not what they see, but how they react to what they see.
If such minor mental effects were violations of the Laws of Magic, then so would Harry's Potion of Unnoticeability in Fool Moon.
I rule that mental nudges and suggestive emotional effects don't count as enthrallment, because they don't control they just suggest, and thus don't break the Fourth Law.
Specifically, that potion made Harry so dull to everyone, that nobody even noticed him. While it's not exactly a veil, it's also not exactly entering somebody's mind. It's definitely a "grey" potion.
Oh, and as for blinding light: changes spoiler Molly's "One Woman Rave" spell. That's pretty much the entire point of it. Confusion and distraction. :)