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Vision tests in the mouse: Functional phenotyping with electroretinography.

Frontiers in Bioscience
Frontiers in BioScience
Publication Date
DOI: 10.2741/3409
  • Animals
  • Electroretinography
  • Flicker Fusion
  • Mice
  • Mice
  • Inbred C57Bl
  • Vision Tests
  • Biology
  • Engineering
  • Medicine


Electroretinography (ERG) is an established diagnostic technique in clinical ophthalmology and provides objective information about retinal function. This technique is also applied in basic research, where animal models of hereditary retinopathies have significantly contributed to our understanding of the composition of ERG responses in general and how retinal degenerative pathologies alter retinal function specifically. Indeed, electrophysiologic assessment of transgenic mice, which are genetically engineered to mimic human mutations that lead to retinal diseases, can be well compared with clinical data. Furthermore, limitations on examinations (e.g. length of measurement, range of light intensity) are much less of a concern when assessing mice compared to human patients. In order to measure and analyze retinal responses properly, several important aspects have to be considered. This paper focuses on these aspects, and shows exemplary ERG data which were obtained from normal wild-type mice and from transgenic mice with specific functional properties, namely Rho-/- (rod opsin knockout, cone function only), and Cnga3-/- (cone CNG channel deficient, rod function only) to illustrate rod and cone system contributions to ERG responses.

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