Text-book of ophthalmology . numerous con-cretions of a yellowish hyaline substance, to which in fact the Pinguecula owes its yel-low color. As a result of these changes, the conjunctiva in this place becomes less trans-parent, for which reason the Pinguecula appears most prominent when the conjunc-tiva bulbi is markedly reddened, whether from injection or from extravasation of this case the Pinguecula does not allow the red color of the blood to shine throughas plainly as does the adjacent conjunctiva that is not thickened, and the former, there-fore, stands out from the red substrat
Text-book of ophthalmology . numerous con-cretions of a yellowish hyaline substance, to which in fact the Pinguecula owes its yel-low color. As a result of these changes, the conjunctiva in this place becomes less trans-parent, for which reason the Pinguecula appears most prominent when the conjunc-tiva bulbi is markedly reddened, whether from injection or from extravasation of this case the Pinguecula does not allow the red color of the blood to shine throughas plainly as does the adjacent conjunctiva that is not thickened, and the former, there-fore, stands out from the red substratum in the form of a light-colored triangle, so thatby beginners it is easily confounded with a diphtheritic infiltration of the conjunctiva,or, when the yellow color is pronounced, with a small pustule. 123. Conjunctival Vessels.—The conjunctiva of the eyeball receivesits blood-vessels chiefly from the vessels of the retrotarsal fold—the posteriorconjunctival vessels (Fig. 43, h and hi). Furthermore, the anterior ciliary. Fig. 43.—Blood-Vessels op the Anterior Segment of the Eye. Schematic. (After Leber.)The posterior conjunctival vessels, h and hi, communicate with the anterior conjunctival vessels, »,which come to meet them and which are branches of the anterior ciliary vessels, c and c\\ and with thelaft<r form the marginal network in the limbus. n, Schlemms canal; H, cornea; B, conjunctiva; of the recti muscles; L, lens. els (Fig. 43, c and Ci) take part in supplying the conjunctiva with vessels come from the four recti muscles (R, Fig. 43) and run underthe conjunctiva (through which they are visible, shining with, a bluish 2 Caruncula, dim. of caro, flesh. 3 Pinguis, fat. 138 TEXT-BOOK OF OPHTHALMOLOGY luster) until near the edge of the cornea, where they suddenly disappear,since they pass through the sclera into the interior of the eye. But beforethis happens, they give off branches which end in vascular loops, in thelimbus conjunctivae directl
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