MEEBOMIAX GLANDS. 



63 



FIG. 3. 



In general structure there is little, if any, difference 

 between the terminal follicles of the Meibomian glands and 

 the follicles of the ordina- 

 ry sebaceous glands. They 

 are lined with cells meas- 

 uring from -^ to 1^ 

 of an inch in diameter. 

 These cells contain nume- 

 rous fatty globules, but 

 they do not coalesce into 

 large drops, such as are 

 often seen in the ordinary 

 sebaceous cells. 1 The fol- 

 licles and ducts are filled 

 with the whitish, oleagi- 

 nous matter 

 stitutes the 

 secretion, or 

 palpebrale. 



In addition to the 

 Meibomian secretion, the 

 edges of the palpebral 

 orifice receive a small 

 amount of secretion from 

 ordinary sebaceous glands 

 of the compound race- 

 mose variety (ciliary 

 glands), which are ap- 

 pended in pairs to each of the follicles of the eyelashes, 

 and the sebaceous glands attached to the small hairs of the 

 caruncula lachrymalis. 



Ordinary /Sebaceous Matter. Although it may be in- 

 ferred, from the great number of sebaceous glands opening 



which con- 

 Meibomian 

 the sebum 



Meibomian glands of the upper lid, magnified 

 seven diameters. 1, 1, Free border of the lid ; 



2. 2. Anterior lip penetrated by the eyelashes - 



3. 3, Posterior lip, with the openings of the Mei- 

 bomian glands ; 4, A gland passing obliquely 

 at the summit; 5, Another gland oent upon 

 itself; 6. 6, Two glands in the form of racemose 

 glands at their origin : 7, A very small gland ; 

 8, A medium-sized gland. (SAPPEY. Traite 

 ffanatomie, Paris, 1852, tome ii., p. 597.) 



1 KOLLIKER, Handbuch der Gewebdehre des Mensehen, Leipzig, 1867, S. 678. 



