Hämäränäköa
Hämäränäkö, also known as scotopic vision, is the ability of the eye to see in low light conditions. This type of vision relies on specialized photoreceptor cells in the retina called rods. Unlike cone cells, which are responsible for color vision and function best in bright light, rods are highly sensitive to light and are capable of detecting very dim illumination. However, rods do not distinguish between colors, which is why vision in very low light appears in shades of gray.
The transition from daylight vision (photopic vision) to dim light vision (hämäränäkö) is not instantaneous. It
Hämäränäkö is crucial for activities that occur at dawn, dusk, or during the night, such as nocturnal