Retina. Laser scanning light micrograph of a section through a normal retina in the optic fibre layer (mouse tissue). This layer is responsible for relaying information from the retina to the brain. Seen here are: glial cells (green), DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) in the cell bodies of the retinal ganglion neurons (orange), optic nerve fibres (red) and actin in endothelial cells surrounding a prominent branching blood vessel (blue).