A modular electronic communication system is disclosed with interchangeable components attachable on eyewear. A plurality of pre-existing eyewear models can each be retrofitted by attachment of one or more of such interchangeable components to that eyewear. Such components can be configured for custom attachment with a particular eyewear or such components can be configured for universal attachment with one or more different eyewear models. The communication system can be configured to produce an adjustable heads-up display for the wearer of the eyewear. The electronic communication system can comprise a plurality of interchangeable, electronically interconnected components, such as a first optical module, a first base module, a base link, a second base module, and/or a second optical module. In some embodiments, one or more or all of the components of the electronic communication system are integrally and permanently attached to an eyewear and are not interchangeable or modular.