Blood and Sand- Blind doesn't seem to work

I'm using blood and sand to blind nearby enemies. They're not being blinded though.

The skill text says nearby enemies are blinded in sand stance, or maimed in blood stance. It doesn't say I have to hit the monsters or anything else, just that they're blinded. If that's not the case the skill needs reworded.

Using my saboteur as a reference, blind to nearby enemies from the ascendancy has a visible white star or something over the monster's head for effect.

To test this in a somewhat controlled environment, I stood next to monsters in blood aqueduct. They weren't effected by a blind effect visibly, nor on their de-buff list.

Thanks!

I figured out what I was missing. The sand effect is visually different. No fix needed I think. It's just harder to see the sand effect.