näköaistit
Näköaistit (visual sensations) refer to the sensory perceptions that arise from the visual system, encompassing the detection and processing of light, color, shape, motion, depth, and spatial relationships. The human visual system begins with the eye, where photons enter through the cornea and pupil, pass through the crystalline lens, and strike the retina. Photoreceptor cells – rods sensitive primarily to luminance and cones sensitive to color – transduce light signals into neural impulses. These impulses travel via the optic nerve to the visual cortex in the occipital lobe of the brain, where higher‑level processing assembles the basic elements of sight into coherent images and visual experience.
Key components of näköaistit include visual acuity (the sharpness of vision), chroma perception (the ability to
Clinical conditions that affect näköaistit range from refractive errors such as myopia and hyperopia, to retinal
Research into näköaistit explores both the biological underpinnings of visual perception and the application of sensory