in the crucian carp population used in this work the total number of ganglion cells per retina was found to increase from roughly 140,000 ( mean of 8 scattered value ) to a full 200,000 between eye diameters 4 and 10 mm , this increase taking place mainly between eye diameters of 4 and 6.5 mm .
C0035298
retina
C0015392
eye