The human eye is called the window to the central nervous system. It is the only part of the Centeal nervous system which is exposed to the external world. read more
We can't reconstruct nerves .Once fully severed they can't be repaired or reconstructed unlike arteries, veins or muscles. Color blindness in itself is a defect in the cones of the retina. It's genetic in most cases. The problem is neurological, so there are no solutions in the world of transplantation for this problem that I know that of. read more