This figure measures two distinct features of hdf+/- retinae (but not in different ways). Need to show an actual ERG trace as well as the quantification. Given the change in b and c waves, it might have been more informative to show staining/analysis of the photoreceptors and/or bipolar cells. If the info in the figure does not change, the organisation should focus on ERG first and then the morphology/ONL/INL densities (panels B and C could be A and B) then panel A could be C. Rest of organisation is fine, but unclear why images of 4 different hets were included when there weren't any differences between the morphology of the hets versus wild-type sibling.
Also, statistics used not clear and p values not stated.