Definition: An annular transitional zone, approximately 1 mm wide, between the cornea and the bulbar conjunctiva and sclera. It is highly vascular and is involved in the metabolism of the cornea. It is ophthalmologically significant in that it appears on the outer surface of the eyeball as a slight furrow, marking the line between the clear cornea and the sclera. (Dictionary of Visual Science, 3d ed)
a slight furrow between cornea & sclera: do not index under SCLERA unless sclera is particularly discussed; /transpl is unlikely: article will likely be on CORNEAL TRANSPLANTATION with anat or physiol ref to LIMBUS CORNEAE with pertinent qualif
