Are Google glasses enough safe to wear?

Hello to all members of Techulator I want to ask you simple question regarding the latest creation of Google which are Google glasses I know its features are very good and amazing but is it enough safe to wear Google glasses whole time in a day like a phone I want to ask the experts that what are the effects and long term effects of using Google glasses. Is there any disease which is caused by Google glasses did it emit any radiations in the air which are harmful for us or are they safe is it emitting any microwave radiations which can cause us different diseases like cancer.