Guild Wars 2

says field lingers 4 sec. is blind reapplied as long as one is in it, or one needs to enter/exit? i’ve been tracking enemy blinds and not sure. stimes they are up all the time, stimes not sure.

Smoke Bomb ticks once every 2 seconds for 4 seconds, meaning it blinds once 0 seconds, 2 seconds and 4 seconds after explosion.
It doesn’t blind every second anymore since the Dec. 2012 patch.

It is applied on the instant the bomb goes off, then pulses and will reapply once every second for 3 seconds after. Fire bomb and glue bomb work the same way. Also, each pulse of those bombs will proc bleeds or vulnerability with the respective traits in that line.

Thank you, that is helpful.

Okay, another one: when blind becomes effective, in terms of enemy casting? Should it be before casting? Or in the middle? How about those enemy skills which pulsate?

There used to be a good page in wiki about cast time and phases of it, can not find it now.

Any blind that happens before the enemy skill lands on you is effective. So if his projectile is in the air when you blind him, it will miss.

Thank you @Nevir