Using low-power laser illumination of the human eyein vivo,it is possible to observe interference fringes produced by light reflected from different optical interfaces within the eye, in particular from the front surface of the cornea and from the retina. Real-time changes in these fringes have also been observed, reflecting deformation of the eye in response to the subject's heart-beat. Some experimental results are presented. Possible applications of this technique include its use as an ophthalmological diagnostic tool in the measurement of such parameters as eye rigidity and intra-ocular pressure.