Trasplantation of tissues on the bare sclera in pterygium operations

1. In auto-conjunctival grafts on bare sclera, practically all their structures survive2. In homo-conjunctival transplants, practically all their elements do not survive and are eventually replaced3. In hetero-conjunctival monkey transplants all their elements do not survive and are replaced4. In heterotopic auto-transplants of buccal mucosa, there is partial survival and partial replacement of its elements particularly the vascular5. For practical purposes after pterygium, when the bare sclera is small there is no advantage in covering it with a graft. When large, the first choice biologically is an autograft from the same or opposite eye, although the second and more practical preference would be a buccal mucosa graft. (Conclusions)