OPHTHALMOSCOPY AND SKIASCOPY. 

 By ALFRED M. HALL, A. M., M. D. 



LII. Normal ophthalmoscopy, direct method. 



Gould defines ophthalmoscopy as, "the examination 

 of the interior of the eye by means of the ophthalmoscope." 

 Normal ophthalmoscopy is the examination, by means of 

 the same instrument, of the normal eye or a model of 

 the normal eye. 



1. Appliances. An ophthalmoscope, with concave mirror; 

 dark room; lamp; and Thorington's skiascopic eye or an 

 equivalent. 



2. Preparation. Arrange the model and the lamp so that 

 they will be in the horizontal plane with the observer's 

 eye. Place the skiascopic eye directly in front of the 

 observer's eye, and the lamp a little to one side of the 

 model. 



j. Operation. Let the observer hold the ophthalmoscope 

 with the right hand, mirror forward, close to the eye, 

 directing the vision through the hole in the instrument. 

 Throw the light, reflected by the mirror, into the skia- 

 scopic eye. Find the red reflection of the fundus, then 

 gradually lessen the distance between the observer's eye 



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