How to start development of Google Glass applicationThis is ambitious project of Google and Google has marketed well among user. The best thing about Google is it kept as simple as possible for developer. Existing android developer can male Google Glass application easily. Google Android provide GDK(Glass Development Kit) which can be added as add-on to Android SDK.
You will feel like working for android in same environment for Google Glasses. Its exceptionally similar until you go for testing your application.
Developer need Google Glasses in real to test and deploy. First link to start development is Start Google Glass Development