...which is why its available for the already chunky wayfarer frames and not the svelte Aviators. Past camera spy glasses were so chunky as to be obvious if you know to look what to look for. Can't say how unobtrusive or obvious the lens is for the Metas but the Temples are not discernably thicker or different in appearance from non-enhanced Wayfarers. Wishing they'd Add an inertial sensor making them quite useful for tort / crim evidentiary purposes.