Relationship of Ciliary Body Meridional Muscle and Corneoscleral Trabecular Meshwork

Introduction Although the relationship of the meridional muscle fibers of the ciliary body and the corneoscleral trabecular meshwork has been clearly described in the older literature,1,2more recent papers3-5have differed somewhat in the anatomy of this portion of the angle structures in the human eye. The purpose of this paper is to follow the embryological and postnatal development of the ciliary body, scleral spur, and corneoscleral meshwork and present evidence that the corneoscleral trabecular meshwork, except for the tissue adjacent to Schlemm's canal, is continuous with the meridional muscle of the ciliary body and therefore represents the tendon of insertion for this muscle into the cornea at Schwalbe's line. Material and Methods Human fetus eyes from 5 months to birth and infant, children, and adult eyes were bisected in the horizontal meridian, serially sectioned at 18μ in celloidin, and stained with hematoxylin-eosin or Mallory trichrome. The ciliary