FACE AND FRONTAL REGION OF HEAD 135 



adjoining its free margin. They differ very materially from 

 each other. The superior tarsal plate is much the larger of 

 the two, and presents the figure of a half oval. Its deep 

 surface is intimately connected with the subjacent conjunctiva, 

 whilst its superficial surface is clothed by the orbicularis muscle, 

 and is in relation to the roots of the eyelashes. Its superior 

 border is thin, convex, and continuous with a tendinous 

 expansion of the levator palpebrae superioris. The inferior 

 border of the tarsal plate is thickened and straight, and the 

 integument adheres firmly to it. 



The inferior tarsal plate is a narrow strip which is similarly 

 placed in the lower lid. 



Glandulse Tarsales (O.T. Meibomian Follicles). At this 

 stage the student should examine the tarsal glands, which he 

 will display by everting the eyelids. They are placed on the 

 deep surfaces of the tarsi. To the naked eye they appear 

 as closely placed, parallel, yellow granular -looking streaks, 

 which run at right angles to the free margins of the lids. 

 They are more numerous and of greater length in the 

 upper lid, and, being lodged in furrows on the deep surface 

 of the tarsal plates, they are distinctly visible upon both 

 aspects of these, even while the conjunctiva is in position. 

 Their ducts open upon the free margin of each lid posterior 

 to the eyelashes. 



The Palpebral Fascia. The palpebral fascia is a sheet of 

 fibrous membrane which occupies the interval between the 

 tarsi and the margins of the orbit, forming, with the tarsi, a 

 septum between the orbit and the exterior. Its peripheral 

 border is attached to the orbital margin, except at the medial 

 angle of the orbit, where it occupies a more posterior plane, 

 and is attached to the crista lacrimalis, posterior to the medial 

 palpebral ligament and the lacrimal sac. Its central border 

 in the lower lid is connected with the lower border of the 

 lower tarsus. In the upper lid it blends with the expanded 

 tendon of the levator palpebrae superioris, and is attached 

 with it to the anterior surface of the upper tarsus. It is 

 pierced by the supra-orbital, supra-trochlear, and lacrimal 

 branches of the first division of the trigeminal nerve, and 

 by the terminal branches of the ophthalmic artery. 



Raphe Palpebralis Lateralis. The lateral palpebral raphe 

 (O.T. external tarsal ligament) is merely a thickening of the 

 palpebral fascia, between the lateral commissure and the 

 ii 9 c 



