The American encyclopedia and dictionary of ophthalmology Edited by Casey AWood, assisted by a large staff of collaborators . Temporal muscle,m. Lachrymal nerve. is extremely transparent, and so intimately a part of the cornea thatit may properly be regarded as its outer layer. The conjunctivacovering the sclera is very thin, and so loosely attached to this struc-ture by connective tissue fibres (the episcleral tissue) as to permitof free and independent movement of the eyeball. The conjunctiva covering the sclera is always stretched duringwide excursions of the eyeball. Near the sclero-cornea
The American encyclopedia and dictionary of ophthalmology Edited by Casey AWood, assisted by a large staff of collaborators . Temporal muscle,m. Lachrymal nerve. is extremely transparent, and so intimately a part of the cornea thatit may properly be regarded as its outer layer. The conjunctivacovering the sclera is very thin, and so loosely attached to this struc-ture by connective tissue fibres (the episcleral tissue) as to permitof free and independent movement of the eyeball. The conjunctiva covering the sclera is always stretched duringwide excursions of the eyeball. Near the sclero-corneal margin, or ANATOMY (GROSS) OF THE HUMAN EYE 357 limbus, the attachment is very secure; this point is taken advantageof by surgeons who seize the membrane here with catch forceps forthe purpose of steadying the globe during operative procedures. In adults, there may be seen at each side of the corneal margin inthe line of the lid-fissure, a small, yellowish elevation of triangularform, with the base toward the cornea; this is called the Pinguecula,and is present as a result of a fatty tissue-change in the conjunctiva. External Muscles of tlie Eye. where it is exposed to the influence of the air, namely, in the zone ofthe lid-fissure. The whole membrane is covered with pavement epithelium, whichis continued over the cornea; it also lines the canaliculi as far as thelachrymal sac. At the inner canthus between the caruncle and the eyeball, is adelicate fold, or reduplication, of the conjunctiva, called the plicasemilunaris conjunctivcv; it is analagous to the nictitating membrane(q. V.) found in birds. The blood supply of the ocular conjunctiva is derived chiefly fromthe posterior conjunctival branches of the vascular arches of the lids,by way of the fornices; also from the anterior ciliary vessels, whichcome out of the four straight eye-muscles. These latter course under-neath the conjunctiva up to near the limbus, where they suddenlydisappear and pass through the sclera into th
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectophthalmology, bookye
