TECHNIQUE OF EYE DISSECTIONS 



iieo-scleral junction, the weight of the con- 

 tents of the second tunic will cause it to sag 

 and give opportunity to easily separate, with 

 the back edge of the scalpel, the choroid from 

 the sclerotic for about a distance of from 8 

 to 10 mm. 



It has been the method in the past to force 

 water through a blowpipe between the scle- 

 rotic and the choroid, in order to separate the 

 attachments. It has also been the method to 

 work under water when wishing to expose or 

 isolate either the choroid or the retina, It 

 is unnecessary to do either of these two things. 



When the sclerotic has been loosened from 

 the choroid for about 10 him. back from its 

 cut edge around the eye, carefully cut the 

 loosened part away. (Fig. 25.) Then loosen 

 the choroid as far back as to within 1 cm. of 

 the optic nerve. Cut the separated sclerotic 

 away. It will be well to state here that during 

 this dissection the specimen should not be 

 lifted from the table. Keep the eye resting 

 on the table all the time, and never lift it by 

 holding it suspended from the optic nerve. 



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