Samarasinghe Eye Hospital

Retina: the neural gateway where light is transformed into vision through precise cellular organization and signal processing.

The retina is a highly specialized, multilayered neural tissue lining the inner surface of the eye, responsible for converting light into electrical signals that the brain interprets as vision. Incoming light passes through the inner retinal layers before reaching the photoreceptors rods for dim light and peripheral vision, and cones for color and high-acuity vision where phototransduction begins. These signals are then transmitted to bipolar cells and modulated by horizontal and amacrine cells, enhancing contrast and refining visual input. Finally, ganglion cells generate action potentials, and their axons form the optic nerve, carrying visual information to the brain.

This diagram highlights the organized retinal layers from the retinal pigment epithelium (RPE) to the nerve fiber layer and emphasizes the concept of the inverted retina, which is essential for efficient visual processing and clinical understanding..