Elastography plays a key role in characterizing soft tissue. Although it has found widespread use in clinical diagnostics, nearly all methods require direct physical contact with tissue and can even be invasive. However, for a number of applications (ophthalmic, for instance) physical contact is not desired and may not even be allowed. Recently, we proposed a fundamentally new approach to 4-D dynamic elastography using non-contact mechanical stimulation (e.g. from air) of soft media with an air-coupled focused US transducer (we call it acoustic micro-tapping, AμT) combined with ultrafast phase sensitive (PhS) OCT . Here, we report on new AμT-OCT system developments and new results obtained in ex-vivo and in-vivo studies on eye and skin.