The cornea is a clear, dome shaped covering and it serves as the eye's main lens.
Sclera
The sclera is the thick, white outer layer of the eyeball and it serves as protection along with the cornea.
Pupil
Variable-sized, circular opening in center of iris; it appears as a black circle and it regulates amount of light that enters the eye.
Iris
Pigmented tissue lying behind cornea that (1) gives color to eye, and (2) controls amount of light entering eye by varying size of black pupillary opening; separates the anterior chamber from the posterior chamber.
Choroid
The choroid is the vascular layer of the eye lying between the retina and the sclera, about 0.5mm thick. The choroid provides oxygen and nourishment to the outer layers of the retina.
Canal of Schlemm
The canal of Schlemm is a circular channel in the eye that collects aqueous humor from the anterior chamber and delivers it to the bloodstream.
Lens
The lens is secondary to the cornea and is used for fine tuning the focus.
Macula
The macula is a small, sensitive area of the central retina used for fine visual skills such as reading.
Fovea
The fovea is located in the center of the macula. It's where vision is the most acute.
Retina
The eye focuses light on the retina. The retina is where light receptor cells translate light into signals that go to the brain.
Cones and rods are specialized light-sensitive cells (photoreceptors) in the retina. Cones provide sharp central vision and color vision. Rods handle side vision and vision in dim lighting conditions.
Vitreous
Transparent, colorless, gelatinous mass; fills rear two-thirds of the interior of the eyeball, between the lens and the retina.
Optic Nerve
The optic nerve carries the signals from the retina to your brain. The brain translates this visual information into images that you see.
= Pop-up window
= External window
= Adobe .pdf file
