1. 
   flicker photometer
   visual photometer in which the observer sees either an undivided field illuminated successively, or two adjacent fields illuminated alternately, by two sources to be compared, the frequency of alternation being conveniently chosen so that it is above the fusion frequency for colours but below the fu...
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-05-19
   
   
2. 
   flicker photometer
   Type: Term Definitions: 1. an instrument that compares two variable visual stimuli through control of the frequency of a flickering light.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=68633
   
   
3. 
   flicker-photometer
   (from the article `eye, human`) ...stimuli appear coloured, but the subject is asked to ignore the colours and match them on the basis of their luminosity (brightness). This is ...
   Found op http://www.britannica.com/eb/a-z/f/36
   
   

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