Eye Anatomy
What is the colored part of your eye?
Iris
What is the common word for myopia?
Nearsightedness
What organ actually interprets the information your eyes collect?
The brain
What happens to your pupils when you enter a dark room?
Answer: They get larger/dilate.
TRUE OR FALSE: You blink thousands of times per day.
True
What is the black-looking opening in the center of your eye? Hint: start with p
Pupil
If someone is nearsighted, which is usually clearer: nearby objects or faraway objects?
nearby objects
What nerve carries visual information from your eye toward your brain?
Answer: Optic nerve
Which cells help us see color: rods or cones?
Answer: Cones
TRUE OR FALSE: Tears only appear when you’re crying emotionally.
Answer: False
What part of the eye focuses light onto the retina?
Hint: start with L
Lens
What vision condition causes distant objects to appear blurry because light focuses in front of the retina?
Hint: start with M
Myopia
Why do humans have two eyes instead of just one? Name one advantage.
Answer: Better depth perception / wider field of view
Which cells are especially useful for seeing in dim light?
Answer: Rods
What is the main reason you blink?
A. To change eye color
B. To keep the eye’s surface moist and protected
C. To improve hearing
D. To make the pupil smaller
B. To keep the eye’s surface moist and protected
MULTIPLE CHOICE: Which structure contains the photoreceptors that detect light?
A. Cornea
B. Retina
C. Iris
D. Optic nerve
B: Retina
MULTIPLE CHOICE: Astigmatism is usually caused by:
A. An irregularly shaped cornea or lens
B. Having blue eyes
C. Blinking too much
D. Having a large pupil
A. An irregularly shaped cornea or lens
MULTIPLE CHOICE: Which brain lobe is most associated with processing visual information?
A. Frontal
B. Temporal
C. Occipital
D. Parietal
Answer: C. Occipital lobe
MULTIPLE CHOICE: Humans normally have three types of cone cells most sensitive to different ranges of:
A. Red, green, and blue light
B. Black, white, and gray
C. Yellow, purple, and orange
D. Infrared, visible, and ultraviolet
A. Red, green, and blue light
MULTIPLE CHOICE: Why is there a natural “blind spot” in each eye?
A. The lens blocks light
B. There are no photoreceptors where the optic nerve exits the retina
C. The pupil becomes too small
D. The brain temporarily stops processing vision
B. There are no photoreceptors where the optic nerve exits the retina
MULTIPLE CHOICE: Which part of the retina is responsible for the sharpest central vision?
A. Optic disc
B. Sclera
C. Fovea
D. Pupil
C. Fovea
MULTIPLE CHOICE: Which type of lens is commonly used to correct myopia?
A. Convex
B. Concave
C. Cylindrical only
D. Magnifying
B. Concave
MULTIPLE CHOICE: Your brain combines the slightly different images received by your two eyes. This especially helps with:
A. Hearing
B. Depth perception
C. Color blindness
D. Pupil dilation
Answer: B. Depth perception
MULTIPLE CHOICE: Why can’t humans normally see ultraviolet light?
A. UV light has no wavelength.
B. Our visual system isn’t normally sensitive to those wavelengths.
C. UV light only exists at night.
D. The pupil destroys UV light.
B. Our visual system isn’t normally sensitive to those wavelengths.
If your retinal image is inverted, why doesn’t the world look upside down?
A. The cornea flips it again
B. The pupil rotates the image
C. The brain processes visual information into our normal perception
D. The retina physically turns around
C. The brain processes visual information into our normal perception