#$%^&*AU2017216514A120170831.pdf#####OPTICAL TROCAR SYSTEM Abstract An optical trocar system (10), comprising an elongated obturator member (14) having an optical member (20) at a distal end thereof, wherein a central section of an outer surface of the optical member (20) includes a pair of diametrically opposed generally convex surfaces (222), and the central section of the outer surface of the optical member further includes a pair of diametrically opposed generally concave surfaces (242) that are positioned circumferentially between the pair of diametrically opposed generally convex surfaces (222).