The process of focusing the lens for close vision.
Transparent watery fluid in the anterior segment of the eyeball.
The pigmented vascular middle tunic of the eye (where the blood vessels are.)
Anterior portion of the choroid that includes the ciliary muscle and ciliary process.
Mucous membran lining the anterior surface of the eyeball and posterior surface of the eyelids.
Transparent avascular dome forming the anterior part of the sclera of the eyeball.
Depression in the center of the mucula lutea that contains the greatest density of cones, and is the area of GREATEST VISUAL ACUITY.
Pigmented smooth muscle structure that controls the amount of light entering the eye.
Structure that produces and provides drainage for lacrimal fluid (tears.)
Transparent structure posterior to the pupil that changes shape to focus on objects at various distances.
A yellow oval spot at the center of the retina which absorbs harmful ultraviolet light. It contains only cones and provides sharp, detailed central vision.
The blind spot. Area in the retina that lacks photoreceptors and the optic nerve exits the eye.
Retinal cells responsible for vision. Rod cells detect only black and white, while cone cells detect color.
Opening in the center of the iris through which light enters the eye. (It's a hole.)
The deep tunic of the eye containing the photoreceptors.
The white of the eye. Superficial tunic composed of white fibrous connective tissue.
Scleral Venous Sinus
A sinus located at the junction of the sclera and cornea where aqueous humor drains from the anterior chamber of the eyeball into the blood. Also called canal of Schlemm.
Attaches to the lens of the ciliary body, which allows the lens to change shape.
Sebaceous gland that opens on the edge of each eyelid.
A transparent, jelly-like substance that fills the posterior segment of the eyeball. Composed of a mesh of protein fibers and vitreous humor.
Transparent fluid component of the vitreous body. Without this the retina will detach, causing blindness.