I \ I UBATION 



455 



! ', I 



Extubation (eks-tu-ba' '-shun\ [<>, out; tubus, a I'M" I 

 The removal of a laryngeal tube ; opposed to intuba 



tion. 



Extuberance [ex-tu* '-ber-ans) [ c, out; tuber, mass], 

 A swelling or protuberance. 



Extumescence [eks-lu-mes / -ens) [it, out; turn , to 



swell]. A ]>!<>)<■> tion or swelling. 



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

 beres\ A weaned child. Cf. Sububer. 



Exudate (cks' -u-iiat ) [exudare , to sweat]. Mai 

 that lias filtered through the walls of vessels into the 

 adjacent tissues. 



Exudation {eks-u-da* -shun) [exudare, to sweat], lib 

 tration or oozing of the serum of the blood through 

 tin- walls of the vessels ; a ma>s formed by such 

 filtration. 



Exudative [eks f -u-da-tiv) [exudare, to exude], ufthe 

 nature of or characterized by exudation. 



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

 to ulcerate]. A superficial ulceration. 



Exumbilication [eks-um-bil-ik-a' 'shun) [exumbilicatio ; 

 c i , out ; umbilicus, navel]. Marked protrusion of the 

 navel. 



Exumbral (ehs-um'-bral) [V.v.out; umbra, shade]. In 

 biology, all those parts lying above the free margin of 

 the umbrella of Medusa-; the opposite of subumbral. 



Exumbrella {eks-um-brel' -ah) [ex, out; umbrella, the 

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

 face of the umbrella in Medui 



Exuviae [cks-u' -ve-e) [I-]- Cast-off matters; shreds 

 of epidermis ; also, sloughed materials. 



Exuviate [eks-u f -ve-at] [ex, out ; uere, to put on; from 

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

 skin, shells, hairs, or feathers of animals. 



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

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

 other epidermal part. 



Eyckmann's Test. See Tests, Tabic of. 



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

 modation of. See Accommodation. E., Appendages 

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

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

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

 stance, colored like the natural eye, placed in the 

 socket after enucleation. E., Compound, the organ 

 of vision formed of several crystal spheres, as in the 

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

 diagram of the eye for the more exact calculation of 

 the passage of rays of light through the eye. E., 

 Pineal or Epiphysial, the rudimentary median eye 

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

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

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

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

 supercilium, the connective tissue, skin, and hairs 

 above the eye. The hairs serve chiefly to prevent the 

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

 cells of porcelain, enameled black, to place over the 

 eye after operations. E. -current, the normal electric 

 current that passrs from the cornea (positive) to the 

 optic nerve (negative) under the stimulus of light. 

 E. -doctor, an oculist. E. -drops. See Collyrium. 

 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 



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

 of a micro ; an 



pi< i <■. E.-lid, the protei tive i overing of the i 

 ball, i ompos< 'I "t >kin, glands, connective and mm 

 lar tissue, the tarsus un< tiva, with the cilia at 



the free edge. E.-lid Closure. ,' . /,,/,/<■ 



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

 point above an ocular or simple microscope where the 

 itest aumbi i ol emerging ray- i ross. 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 mil rosi ope. It enables theobservi 

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

 retracting tin eyelids. E. -stone, a small calcan 

 disc, tin- operculum of various Gasteropod molluscs 

 . ■ ■ ; or somi timi - a flattened concretion 

 from the stomach of a European crawfish (Lapillus 

 cancri). In domestic practice it is placed under the 

 eyelid for the removal of a foreign body that has 

 found its was 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 Eve. Tendon or Ligament of Zinn. 

 [. Tendon of Zinn. 2. External rectus divided. 3. Interna! 

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

 oblique. 7. Pulley for superior oblique. S Inferior oblique 

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

 sion. 11. Optic nerve. 



Optic nerve. 2. Central artery 

 of the retina. 3. Short, posterior, 

 ami external ciliary arteries. 4. 

 Short, posterior, and internal cili- 

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

 ternal and internal posterior cili- 

 ary arteries. 7. Posterior long 

 ciliary artery, and Ions; ciliary 

 nerve. S. Artery and nerve of 

 opposite side. 9, 10. Superior and 

 external choroid veins. 11, 12. In- 

 choroid veins. 13. Attach- 

 ment of inferior oblique muscle. 

 14. Tendon of superior oblique. 



Posterior Hemisphere 



of imh Globe of the 

 Eye. 



