An obturator apparatus for penetration of tissue and for permitting visualization includes an elongated shaft having proximal and distal ends, and defining a longitudinal axis and an optical transmitting member mounted adjacent the distal end of the elongated shaft. The optical transmitting member comprises a transparent material for permitting passage of light therethrough and has internal surfaces defining a hollow internal chamber and external surfaces adapted to penetrate tissue. The optical transmitting member is further adapted to provide an inclined field of view inclined relative to the longitudinal axis. The elongated shaft may include a longitudinal opening adapted for reception of an endoscope.
