Back in the mid-90s, when I was doing digital editing, it got so I could easily spot a single bad field (often just a portion of one television scanline) appear

Back in the mid-90s, when I was doing digital editing, it got so I could easily spot a single bad field (often just a portion of one television scanline) appearing for 1/60th of a second (or about 16 milliseconds). It wasn't quite "seeing" though, I was just suddenly aware and when I jogged back to the bad frame, there it would be.