perception checks as an active defense or power defense ?

[Plane]

Not sure if I'm imagining this but I have this recollection in one of the sourcebooks of reading something along these lines where stuff like 'Detect' or even a vision/perception check could use these rules.

I thought maybe Enhanced Senses but I'm not seeing it there.

Maybe it was just something involving the application of Reflexive to Detect in powers? Feels like it was a later book though.

There was also that interesting bit about Link+10% on sight+hearing where you automatically face to stare at something you successfully hear (or vice versa) which seemed pretty cool, I think in PU4.