Hematoxylin and eosin stained images of retinal sections from mice with different numbers of wild type rhodopsin genes.

<p>Genotypes are indicated at left, where 1 Rho is mRho^+/−, 2 Rho is mRho^+/+, and 3 Rho is mRho^+/+NHRE^+/0. Ages in months are indicated at the top. Retinal layers are abbreviated at right, where ROS is rod outer segment, RIS is rod inner segment, ONL is outer nuclear layer, OPL is outer plexiform layer, INL is inner nuclear layer, and IPL is inner plexiform layer.