SIGHT. 



85 



Fig. 78.— Ophthalmoscope. 



The speculum to keep the eyelids apart will be found of great 

 assistance in the examination of that organ, so sensitive to the 

 light when in a state of disease, and so constantly kept closed on 

 that account. It is, in fact, this speculum which renders the use 

 of the ophthalmoscope practicable for the examination of the in- 

 ternal structures of the ocular globe. 



Some of the various patterns of the speculum used in human 



-Examination of Dog's Ear. 



