Chapter 3: How we see Flashcards
What does the location of the eyes enables us to see?
Length, width, depth and distance of an object.
What are the 3 layers of the eye?
Sclera, Choroid and Retina.
What is the Sclera?
The white layer that maintains the shape of the eye.
What controls eye movements?
The Muscles attached to the Sclera.
what is Choroid?
The middle layer that contains the blood vessels.
What is the Cornea?
A clear circular area in the sclera where light enters the eye.
What is the Pupil?
The circular opening in the front of the choroid.
What is the Iris?
The colored smooth muscle surrounding the pupil, that adjusts the size of the opening according to the brightness of light.
Where are the Lens located?
Behind the Pupil and between the anterior and posterior chambers.
What are the Lens?
A transparent, flexible, biconvex structure.
What does the Lens do?
Bends or refracts light rays so they focus on the nerve cells of the retina.
Why the Lens bend or refracts?
To focus them on the rods and cones.
What does the rods and cones do?
Transmit the stimulus to the optic nerve and then to the occipital lobe for interpretation.
The Chambers are filled with what?
With a watery fluid that gives shape to the eye and helps refract the light rays.
What is the name of the anterior fluid?
The aqueous humor.
