Major Layers of the Eyeball
The outermost layer that admits light to its interior and gives shape to the eyeball.
What is the fibrous layer?
The thin, transparent membrane that covers the front portion of the eyeball and lines the interior surfaces of the eyelids.
What is the conjuncitva?
The space in front of the iris that can be clearly seen without any special instruments.
What is the anterior chamber?
The area of the retina where nerve fibers on its surface converge to form the beginning of the optic nerve.
The middle layer of the eye, also called the uvea, that contains the choroid, iris, and ciliary body.
What is the vascular layer?
The gland that produces tears.
What is the lacrimal gland?
The portion of the aqueous compartment of the eye behind the iris.
What is the posterior chamber?
Photoreceptors in the retina that perceive dim light images in shades of gray.
What are rods?
The innermost layer of the eyeball that contains the actual sensory receptors for vision, the rods and cones.
What is the nervous layer?
The thin, translucent structure that moves across the eye from the medial canthus laterally to moisten and protect the eye.
What is the nictitating membrane?
The compartment of the eye behind the lens and ciliary body, containing a soft gelatinous fluid.
What is the vitreous compartment?
Photoreceptors in the retina that perceive color and detail.
What are cones?
The structure that produces the aqueous humor.
What is the ciliary body?
The corner of the eyelids where they come together.
What is the canthus?
The compartment of the eye in front of the lens and ciliary body that contains a watery fluid.
What is the aqueous compartment?
This soft, transparent structure helps focus a clear image on the retina whether the object is being viewed up close or far away.
What is the lens?
The structure that contains two types of smooth muscle fibers that enlarge and constrict the pupil.
What is the iris?
The seventh extraocular muscle that retracts the eyeball slightly deeper into the orbit when it contracts.
What is the retractor bulbi muscle?
The structure that drains aqueous humor from the anterior chamber of the eye.
What is the canal of Schlemm?
The sensory receptors that convert photons of light energy to nerve impulses that are interpreted by the brain as vision.
What are photoreceptors?