Babak Parviz revealed that the augmented-reality glasses have a touchpad on the side for adjusting settings and could also incorporate phone call features.
"We have... experimented a lot with using voice commands," he explained to IEEE Spectrum. "We have full audio in and audio out, which is a nice, natural way of interacting with something that you'd wear and always have with you."
"We constantly try out new ideas of how this platform can be used," he went on. "We're also trying to make the platform more robust.
"This includes making the hardware more robust and the software more robust, so we can ship it to developers early this year."
Google unveiled the cutting-edge eyewear last summer, showcasing a prototype mode with video and audio capabilities, as well as a built-in accelerometer.
Parviz said the device's development team have been working on improving battery life ever since, adding that there are no plans to display advertising on its twin screens. App support is an uncertainty at present.
"This is a complicated thing. This is not a laptop or a smartphone. It's an entirely new platform. So how people interact with it and what people do with it is totally new territory," he added.
"We hope that when we ship this to developers, other people will also figure out what this very powerful platform is able to do."
Google Glass is unlikely to be available to the general public until 2014, but select developers are expected to get their hands on early models this year.