This Week in The Journal

Light microscopic image of retina showing the choroid (Ch), RPE, photoreceptor outer segments (OS), inner segments (IS), and outer nuclear layers (ONL). In IRBP knock-out mice, the outer segments are shorter, wider, and irregularly dispersed, and fewer nuclei are present in the ONL. Scale bar, 20 μm. See the article by Jin et al. for details.