3.1 Vision and the Eye Flashcards
What are the five special senses?
vision
smell
taste
hearing
equilibrium
What sense is the only one without a specialized sense organ?
touch
What does touch include?
pain
pressure
vibration
heat
What is the organ responsible for sight?
eye
How many layers are in the eye?
three
What is the outer layer of the eye?
sclera and cornea
What is the white of the eye?
sclera
What is the posterior and anterior portion of the outer layer of the eye?
posterior = sclera
anterior = cornea
What is the cornea?
transparent part of the eye
Where does light enter the eye?
cornea
What is between the cornea and the lens?
aqueous humor
What is included in the middle layer of the eye?
choroid
cilliary muscle
iris
What prevents light from dispersing throughout the eye
choroid
What is the choroid?
highly vascular and supplies blood to other layers of the eye
What is the function of the ciliary body?
change the shape of the lens allowing it to focus
What does the iris contain?
colored portion of the eye
What is the function of the iris?
controls the amount of light that is let into the pupil
What is the pupil?
hole in the middle of the iris
What is the inner layer of the eye?
retina
What does the retina contain?
two types of photoreceptors
