silmäpallo

Silmäpallo is the Finnish word for eyeball. It refers to the spherical organ responsible for vision. The human eyeball is a complex structure filled with various components that work together to detect light and transmit visual information to the brain. Key parts of the silmäpallo include the cornea, the transparent outer layer that covers the iris and pupil; the iris, which controls the size of the pupil and thus the amount of light entering the eye; and the pupil, the dark opening in the center of the iris.

Inside the silmäpallo are the lens, which focuses light onto the retina; the retina, a light-sensitive layer at the back of the eye containing photoreceptor cells (rods and cones); and the vitreous humor, a gel-like substance that fills the space behind the lens. The optic nerve transmits the visual signals from the retina to the brain, where they are interpreted as images. The movement of the silmäpallo is controlled by six extraocular muscles. The health and proper functioning of the silmäpallo are essential for sight, and various conditions can affect its structure and function, leading to visual impairments.