TECHNIQUE OF EYE DISSECTIONS 



Remove the vitreous by simply tilting this 

 half of the eye, and with the finger push out 

 the vitreous. 



Sometimes the vitreous will adhere very 

 closely to the retina. This occurs especially 

 when the eye has been in formaldehyde for a 

 long time. In such a case the removal of the 

 vitreous without injuring the retina requires 

 patience and care. The use of the scalpel and 

 the scissors may become necessary. Another 

 very good way to remove the vitreous is to 

 take hold of the sclerotic, turn it so that the vit- 

 reous is downward, and then shake gently until 

 the vitreous separates itself from the retina 

 and, drops out. After the vitreous has been 

 removed, notice its glassy appearance; hence 

 its name hyaloid body. Try to pull it apart 

 with the fingers, and it will be noticed that it 

 seems to be held together by more or less of a 

 network of fibres. (Fig. 11.) 



Whichever method for removing the vitreous 

 is followed, the retina will be left rather badly 

 wrinkled and] out* of place. If the last-men- 

 tioned method, which is really the best of the 



41 



