EXTUBATION 



455 



EYE 



Estubation {eks-tu-ba f -shun) [ex, out ; tubus, a pipe]. 

 The removal of a laryngeal tube ; opposed to intuba- 

 tion. 



Extuberance (ex-tu f -ber-ans) [ex, out ; tuber, mass]. 

 A swelling or protuberance. 



Extumescence {eks-tu-mes'-ens) [ex, out ; tumescere, to 

 swell]. A projection or swelling. 



Exuber (ex-u' -ber) [ex, from ; uber, breast : pi. , Exu- 

 beres\ A weaned child. Cf. Sububer. 



Exudate {ek^-u-dSt) [exudare, to sweat]. Material 

 that has filtered through the walls of vessels into the 

 adjacent tissues. 



Exudation (eks-uda'-shun) [exudare, to sweat]. Fil- 

 tration or oozing of the serum of the blood through 

 the walls of the vessels ; a mass formed by such 

 filtration. 



Exudative {eks' -u-da-tiv) [exudare, to exude]. Of the 

 nature of or characterized by exudation. 



Exulceration (eks-ul-ser-a' -shun) [ex, out ; ulcerare, 

 to ulcerate] . A superficial ulceration . 



Exumbilication ieks-um-bil-ik-a' -shun) [exumbilicalio ; 

 >ut ; umbilicus, navel]. Marked protrusion of the 

 navel. 



Exumbral (eks-um'-bral) [ex, out; umbra, shade]. In 



R biology, all those parts lying above the free margin of 

 the umbrella of Medusae ; the opposite of subumbral. 

 eumbrella (eks-um-breV '-ah) [ex, out; umbrella, the 

 disc of acalephs]. In biology, the convex outer sur- 

 face of the umbrella in Medusa. 

 Exuviae {eks-u' -ve-e) [L.]. Cast-off matters; shreds 



of epidermis ; also, sloughed materials. 

 Exuviate {eks-u' -ve-at) [ex, out ; uere, to put on ; from 

 ittdwia, clothes]. To moult, shed, or slough off 

 skin, shells, hairs, or feathers of animals. 

 Exuviation [eks-u-ve-a' -shun) [exuvite, slough ; exuere, 

 to put off] . The shedding of the deciduous teeth, or 

 other epidermal part. 

 Eyckmann's Test. See Tests, Table of. 

 Eye (?) [ME., eye']. The organ of vision. E.. Accom- 

 modation of. See Accommodation. E., Appendages 

 f, the eyelids, brows, and lachrymal apparatus. E., 

 Apple of, formerly the eyeball ; the pupil. E., Arti- 

 cial, a thin shell of glass, celluloid, or other sub- 

 ice, colored like the natural eye, placed in the 

 ket after enucleation. E., Compound, the organ 

 f vision formed of several crystal spheres, as in the 

 iwer crabs. E.. Diagrammatic, of Listing, a 

 iagram of the eye for the more exact calculation of 

 ie passage of rays of light through the eye. E. t 

 Pineal or Epiphysial, the rudimentary median eye 

 some lizards. E., Schematic, an ideal or normal 

 ye. E.-ball, the globe of the eye. E.-ball, Dis- 

 ocation of. See Dislocation. E.-bone, a sclerotal, 

 E. -bright. See Euphrasia. E.-brow, the 

 percilium, the connective tissue, skin, and hairs 

 ibove the eye. The hairs serve chiefly to prevent the 

 weat from falling into the eye. E. -cells, cup-shaped 

 ells of porcelain, enameled black, to place over the 

 ;ye after operations. E.-current, the normal electric 

 ent that passes from the cornea (positive) to the 

 ptic nerve (negative) under the stimulus of light. 

 E. -doctor", an oculist. E. -drops. See Colly num. 

 Also an old name for tears. E. -glass, a lens worn 

 in one eye. Eye-glasses, pince-nez, worn instead of 

 spectacles, and held in position by a spring acting upon 

 the bridge of the nose. E. -ground, a synonym of 

 the fundus oculi or internal aspect of the vitreous 

 chamber of the eye. E. -lashes, the cilia ; the hairs 

 of the eyelid. E.-lashes, Evulsion of, pulling out 

 the lashes. E.-lashes, Transposition of, shifting 

 an excised strip of cilia and lid-edge containing the 

 hair-bulbs to a new position, or otherwise altering the 



direction of the lashes by operation. E.-lens, the 

 lens of a microscope to which the eye is applied ; an 

 eye-piece. E.-lid, the protective covering of the eye- 

 ball, composed of skin, glands, connective and muscu- 

 lar tissue, the tarsus and conjunctiva, with the cilia at 

 the free edge. E.-lid Closure. See Reflexes, Table 

 of. E. -piece. Synonym of Ocular. E. -point, the 

 point above an ocular or simple microscope where the 

 greatest number of emerging rays cross. E. -salve, a 

 medicated salve for the eyes. E. -shade, Ward's, a 

 circular disc of black rubber connected by an arm with 

 the tube of the microscope. It enables the observer to 

 keep both eyes open. E. -speculum, an instrument for 

 retracting the eyelids. E. -stone, a small calcareous 

 disc, the operculum of various Gasteropod molluscs 

 (Turbinidse) ; or sometimes a flattened concretion 

 from the stomach of a European crawfish {Lapillus 

 canri). In domestic practice it is placed under the 

 eyelid for the removal of a foreign body that has 

 found its way into the eye. E. -strain, the excess and 

 abnormalism of effort, with the resultant irritation, 

 caused by ametropia or heterophoria. It is applied 

 also to the effects of excessive use of normal eyes. E.- 

 souffle, a murmur said to be heard in anemia by 

 means of the stethoscope on the globe of the eye. E.- 

 teeth, the canine teeth of the upper jaw ; dog-teeth. 

 E.-wash, a medicated water for the eye ; a collyrium. 

 E. -water, a collyrium ; also the aqueous humor. 

 E. -winker, an eyelash. 



Muscles of the Eye. Tendon or Ligament of Zinn. 

 i. Tendon of Zinn. 2. External rectus divided. 3. Internal 

 rectus. 4. Inferior rectus. 5. Superior rectus. 6. Superior 

 oblique. 7. Pulley for superior oblique. 8. Inferior oblique. 

 9. Levator palpebrae superioris. 10, 10. Its anterior expan- 

 sion. 11. Optic nerve. 



. Optic nerve. 2. Central artery 

 of the retina. 3. Short, posterior, 

 and external ciliary arteries. 4. 

 Short, posterior, and internal cili- 

 ary arteries. 5, 5, 6, 6, 6. Ex- 

 ternal and internal posterior cili- 

 arv arteries. 7. Posterior long 

 ciliary artery, and long ciliary 

 nerve. 8. Artery and nerve of 

 opposite side. 9, 10. Superior and 

 external choroid vei"s. II, 12. In- 

 ferior choroid veins. 13. Attach- 



_ __ ment of inferior oblique muscle. 



Posterior Hemisphere x Tendon of superior oblique. 

 of the Globe of the 

 Eve. 



