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. 1999 Feb;83(2):241–249. doi: 10.1136/bjo.83.2.241

Figure 4  .

Figure 4  

Electroretinogram rod mediated, cone mediated, and flicker responses of the patient whose maximal retinal response is shown in Figure 3B. (A) Rod mediated responses have a reduced amplitude. (B) Cone mediated responses have a less reduced amplitude. (C) Flicker responses, which cones generate, have a reduction in amplitude equal to that of the cone mediated responses.