øjensans

Øjensans, also known as sight or vision, is the sense that allows organisms to detect light and interpret it as images. This complex process begins with light entering the eye and focusing on the retina, a light-sensitive layer at the back of the eye. The retina contains specialized cells called photoreceptors, namely rods and cones, which convert light energy into electrical signals. Rods are responsible for vision in low light conditions and detect black and white, while cones are active in brighter light and are responsible for color vision and detail.

These electrical signals are then transmitted through the optic nerve to the brain, specifically to the visual cortex located in the occipital lobe. Here, the brain processes these signals, interpreting them as shapes, colors, movements, and depth, ultimately forming our perception of the visual world. Øjensans is crucial for a wide range of activities, including navigation, identifying objects and individuals, reading, and appreciating aesthetic beauty. Different animals have evolved diverse visual systems, ranging from simple light-sensitive spots to highly complex eyes capable of perceiving a spectrum of light far beyond human capabilities. Disruptions to any part of this pathway, from the eye's structures to the brain's processing centers, can lead to various visual impairments.