High-tech glasses are becoming available that enable users to glance at the Internet through a screen placed at the top right of the user’s field of vision. As potentially useful as these devices promise to be, some early adopters have reported experiencing headaches and sharp pains after peering into the gadget. It seems that the screen was developed with “micro-interactions” in mind instead of staring into the screen for a minute or more. Holding the eye in the unnatural position may cause squinting as well as strain eye muscles, which can lead to fatigue and headaches. With this in mind, anyone intent on using this cutting-edge device should use it sparingly at first, one microsecond at a time. It seems that eyeglasses of the future may combine prescription lenses with micro computer screens that provide needed information at a glance.