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December 1962

Relationship of Ciliary Body Meridional Muscle and Corneoscleral Trabecular Meshwork

Author Affiliations

Howe Laboratory of Ophthalmology, Harvard University Medical School, Massachusetts Eye and Ear Infirmary.

Arch Ophthalmol. 1962;68(6):818-822. doi:10.1001/archopht.1962.00960030822017

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,1,2 more recent papers3-5 have 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

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