Eyewear marketer Warby Parker has built four physical stores in the last five months, but there was a time when its founders thought they'd connect with consumers only through the web and by mailing out home try-on kits, according to Neil Blumenthal, co-CEO at Warby Parker.

"We didn't originally think we were going into stores," Mr. Blumenthal said in this interview from the Ad Age @ space at Advertising Week.

See Mr. Blumenthal tell the story: