Chapter 16 Flashcards
(19 cards)
Fibrous tunic
The bulb of the eye
Sclera
The white outer layer of the eyeball. At the front of the eye it is continuous with the cornea
Vascular tunic (uvea)
The pigmented layer of the eye, lying beneath the sclera and cornea, and comprising the iris, choroid, and ciliary body
Iris
A flat, colored, ring shaped membrane fluid behind the cornea of the eye,with an adjustable circular opening (pupil) in the center
Pupil
The dark circular opening in the center of the iris of the eye,varying in size to regulate the amount of light reaching the retina
Ciliary body
the part of the eye that connects the iris to the choroid
Choroid
The pigmented vascular layer of the eyeballs between the retina and the sclera
Retina
A layer at the back of the eyeball containing cells that are sensitive to light
Photoreceptors
A structure in a living organisms, especially a sensory cell or sense organ, that responds to light falling on it
Rods
Are photoreceptors cells that can function in less intense light that the other type of visual photoreceptors, cone cells
Cones
Provides color vision and sharp central vision
Optic disc
The raised disk ion the retina at the point of entry of the optic nerve, lacking visual receptors and so creating a blind spot
Anterior chamber
Is the fluid-filled space inside the eye between the iris and the cornea’s innermost surface, the endothelium
Posterior chambers
consists of small space directly posterior to the iris but anterior to the lens
Aqueous humor
The clear fluid filling the space in the front of the eyeball between the lens and the cornea
Vitreous body
The clear colorless transparent jelly that fills the eyball posterior to the lens
Crystallins
Helps to refract light to be focused on the retina
Color vision
Is the ability of an organism or machine to distinguish objects based on the wavelength of the light they reflect, emit, or transmit
Cornea
The transparent layer forming the front of the eye
