silmänpallon
Silmänpallo, also known as the eyeball, is the primary organ of vision. It is a roughly spherical structure located within the orbit of the skull, responsible for detecting light and transmitting visual information to the brain. The outer layer of the silmänpallo is the sclera, a tough, white, protective casing. The front part of the sclera is transparent and is called the cornea, which helps to refract light entering the eye.
Beneath the sclera is the uvea, a vascular layer that includes the choroid, iris, and ciliary body.
The innermost layer is the retina, a light-sensitive tissue containing photoreceptor cells called rods and cones.
The interior of the silmänpallo is filled with two types of fluid: the aqueous humor in the