Figure 1. Morphology of guinea pig eye tissues for the Hartley strain used for the NEIBank library, stained with hematoxylin and eosin reagent. A: Lens capsule, epithelium and cortex in the bow region: capsule (CAP), epithelium (EPI), and cortical fiber cells (COR). The guinea pig lens is similar to human and mouse. B: Neural retina (NR), retinal pigment epithelium (RPE), choroid (CHR) and sclera (SCL). C: Retinal layer and choroid: ganglion cell layer (GCL), inner nuclear layer (INL), outer nuclear layer (ONL), inner segment (IS), outer segment (OS), retinal pigment epithelium (RPE), and choroid (CHR). The guinea pig retina is 4–5 nuclei thick, similar to the human retina. D: Cornea: corneal epithelium (EP), Bowman’s membrane (BOW), Stroma (STR), Descemet’s membrane (DES) and endothelium (END). The guinea pig cornea is similar to human, while the mouse has a thinner stroma.