IvUXATiO BUIvBI. DISLOCATION OF THF GI.OBE OF 



THE EYE. 



Definition. Dog, anatomical factors. Symptoms : protrusion of bulb 

 through palpebral orifice, orbicular spasm, vessel, muscle, nerve stretching 

 or tearing. Sphacelus. Panophthalmia. Fracture of orbit. Treatment : 

 early reduction, antisepsis, astringents, scarify sclera, cold, puncture 

 aqueous -with hypodermic needle, enlarge palpebral opening, suture 

 and compress, remove foreign bodies and injurious fragments of tissues, 

 enucleation. 



Definition. Di.splacement of the globe of the eye out of the 

 orbit and through the eyelids. 



Causes. Among domestic animals the condition is most fre- 

 quently seen in the dog, which is predisposed by reason of the 

 normal prominence of its eye, the width of the aperture between 

 the lids and the absence of the orbital process of the frontal bone. 

 Blows upon the region and the insertion of pointed bodies, (teeth, 

 horns, etc.), which can act as levers using the margin of the 

 orbit as a fulcrum are especially liable to cause the lesion. Dog 

 fights are the most common occasions. Other animals may also 

 suffer but not at all frequently. 



Symptoms and lesions. In the simplest form the bulb is dis- 

 placed forward out of the orbit and through the palpebrse which 

 latter contract spasmodically behind it and effectually prevent a 

 spontaneous reduction. The optic nerve, muscles, and vessels 

 are unduly stretched and the circulation in the bulb is seriously 

 impaired, so that even in the least complicated cases any undue 

 delay in reducing the dislocation will lead to serious and destruc- 

 tive changes in the eye. Sphacelus of the globe is not uncom- 

 mon under such conditions. 



In the more complicated cases, the conjunctiva, palpebrse, 

 nictitans, muscles, nerves, etc. , may be more or less lacerated and 

 the globe itself may be seriously damaged either by internal 

 lesion or by an external trauma. In all these cases there is most 

 imminent danger of general infective inflammation of the eye, of 

 panophthalmia, and even of secondary general infection of the 

 system. Fracture of the bones of the orbit may also be looked for. 

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