Authors: SWAN M BURNETT 
              Publish Date: 1905/01/14
              Volume: XLIV, Issue: 2, Pages: 88-91 
			  
              Abstract
              Of all the objective methods for determining the refractive state of the eye the shadow test is not only the most reliable but up to a certain point the easiest to apply practically In view of these facts it seems unaccountable that concerning the laws underlying the method there should be such a lack of clear and positive proof offered even by those who are supposed to deal with the subject in an authoritatively scientific manner The ordinary textbooks for students and general practitioners without exception I believe pass over the theoretical part very superficially giving attention wholly to the signification of shadow movements  with  and  against  mentioning the  point of reversal  only casually with a matter of course assumption that everybody knows where it is
              
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