<p>A. Light micrographs of inferior (I) and superior (S) hemispheres of a representative pair of dark- and light-reared mutant retinas. B. Rescue of photoreceptor cells in different regions of the mutant retina. Shown are morphometric measurements of outer nuclear layer thickness (left) and combined inner and outer segment lengths (right) along the vertical meridian from dark and light reared mutant retinas (mean±SEM; n = 6 each group, <i>P<0.0001</i> for both parameters).</p
