Jeffc,
The blip is one way to know that you're eyes are in the Photofocus state.
I notice when I PR that I pick up other clue's such as seeing all four corners of books, seeing double characters, double pictures ... but most importantly, I notice how relaxed my body and how relaxed my eyes are when soft gazing.
In time, this will all become second nature ... keep at it!!!
Michael Saikali