1. A method for optical coherence elastography of tissue of an eye, the method comprising: introducing a probe into the eye, the probe comprising a vibration element; generating time resolved images of the tissue of the eye located posterior the vibration element of the probe by optical coherence tomography; exciting the vibration element to ultrasonic vibrations making the tissue vibrate or oscillate; measuring a displacement of the tissue in the time resolved images; and calculating elasticity values of the tissue from the displacement.