Brain & Special Senses Lab: Eyes
List in sequence the structures, segments and fluids of the eye as light passes through to reach the fovea centralis.
1. Light 2. Clear cornea 3. Aqueous humor 4. Pupil 5. Lens 6. Vitrious humor 7. Retina 8. Fovea centralis
Eye Anatomy - shows clearer picture of fovea centralis & macula lutea
Fovea centralis is located in the depression of macula lutea
Fibrous Tunic
Outer layer of the eye primarily composed of connective tissue known as the sclera and cornea
Optic Disc
Region at the back of the eye where the optic nerve meets the retina. It is the blind spot of the eye because it contains only nerve fibers, no rods or cones, and is thus insensitive to light.
Ciliary Body
Ring of tissue behind the peripheral iris that is composed of ciliary muscle and ciliary processes
Suspensory Ligaments
a fibrous membrane that holds the lens of the eye in place
Iris
a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening
Macula Lutea
a yellowish central area of the retina that is rich in cones and that mediates clear detailed vision
Fovea Centralis
area consisting of a small depression in the retina containing cones and where vision is most acute
posterior segment of eye
filled with vitreous humor
Aqueous Humor
fluid in the eye, found between the cornea and the lens
Anterior Chamber
fluid-filled space between the cornea and iris
Vitreous Humor
jellylike substance found behind the lens in the posterior cavity of the eye that maintains its shape
Vascular Tunic
middle layer of the eye Iris, ciliary body, choroid
Choroid
middle, vascular layer of the eye, between the retina and the sclera
Sensory Tunic
retina - Neural tunic of the eyeball; the innermost of the three tunics of the eye; contains photoreceptors (rods, cones) in the deepest layer, bipolar neurons, amacrine cells and horizontal cells in the middle layer, and ganglion cells in the superficial layer.
Posterior Chamber
space between the back of the iris and the front of the vitreous chamber; filled with aqueous humor
Pupil
the adjustable opening in the center of the eye through which light enters
Retina
the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information
Optic Nerve
the nerve that carries neural impulses from the eye to the brain
Cornea
the transparent layer forming the front of the eye.
Lens
the transparent structure behind the pupil that changes shape to help focus images on the retina
Sclera
white of the eye