Talking out loud to control the Google Glasses via voice recognition is "the weirdest thing," Schmidt said in a talk on Thursday at Harvard University's Kennedy Schoolof Government.
People will have to develop new etiquette to deal with such products that can record video surreptitiously and bring up information that only the wearer can see, Schmidt said.
"There are obviously places where Google Glasses are inappropriate," he said.
Google is making the glasses available to software developers this year but has said they won't be available more broadly until 2014.
Google has decided that it will pre-approve all apps offered to glasses users, unlike its more wide open market for Android phones and tablets.
"It's so new, we decided to be more cautious," Schmidt said. "It's always easier to open it up more in the future."
© Thomson Reuters 2013
For the latest tech news and reviews, follow Gadgets 360 on X, Facebook, WhatsApp, Threads and Google News. For the latest videos on gadgets and tech, subscribe to our YouTube channel. If you want to know everything about top influencers, follow our in-house Who'sThat360 on Instagram and YouTube.