Optical transmission structures include a waveguide and an optical lens wherein the optical lens has a sufficiently large thickness to allow the formation of a curved front lens surface that collimates transmitted light rays so that they travel within a plane that is coplanar to a working surface. A hemostatic material is advanced over the surgical implement and into contact with an area of the blood vessel surrounding the wound. The second lens group includes a lens element having positive refractive power, a meniscus shape, and a convex surface on the magnification side. The virtual disk can be modified to either include or be associated with the metadata that describes a disk type of the virtual disk. The program may be delivered to the pda by email.