A misshapen cornea or lens might result in…
C. lack of peripheral vision.
D. lack of depth perception.
Someone with 20/10 vision has…
A. much worse vision than an average person.
B. much better vision than an average person.
C. the same vision as an average person.
Optical illusions are caused by a mismatch between what the eye sees and…
A. how light is refracted onto the retina.
B. how the brain interprets the image.
C. how fast the optic nerve carries the image.
D. the shape of the lens.
Seeing movement in your peripheral vision is primarily caused by your…
Which of the following is primarily responsible for refracting light?
A. The sclera
B. The lens
C. The aqueous humor
D. The retina
The ability to adjust your vision to focus on objects near and far away quickly is your…
C. color vision.
Which of the following keeps the cornea in place?
A. the aqueous humor
B. the vitreous humor
C. the muscles surrounding the eye
D. the eyelid
Which of the following is part of the iris?
A. The pupil
B. The lens
C. The fat pads
D. The aqueous humor
A person with only one eye would probably have bad…
A. depth perception.
Max holds a card in front of his face. As he moves the card closer, some of the images on the card seem to disappear. What is the most likely explanation for this?
A. The images are focused on Max’s blind spot.
B. The images are beyond Max’s nearpoint.
C. Max has 20/100 vision.
D. Max is looking at an afterimage.
Afterimages are caused by…
A. the blind spot.
B. fatigue in the cones.
C. not enough vitreous humor.
D. a misshapen lens.
Myopia (near-sightedness) occurs when a person’s eye is…
A. too long.
B. too short.
C. lacking in vitreous humor.
D. lacking in aqueous humor.
If you had your lens removed, what would you see?
A. Everything would be extremely blurry.
B. Nothing; you would be blind.
C. Everything would be in black and white.
D. Everything would be normal, but the colors would be inverted (flipped).
Max has a genetic defect in some of his cone cells. Therefore, Max has which problem with his vision?
A. Max is hyperopic (far-sighted).
B. Max is color-blind.
C. Max has astigmatism.
D. Max has no depth perception.
Which of the following is good at seeing movement or light, but not color or detail?
Hyperopia (far-sightedness) occurs when the eye is…
B. too short.
C. too long.
D. missing its rods.
If your lens focuses light on the part of the retina where the optic nerve attaches, what will you see?
B. an image much larger than it really is
C. an image much smaller than it really is
D. an image with the colors inverted (flipped)
Which of the following activities would be dangerous for someone with poor depth perception?
A. Driving a car
C. Discerning between two similar colors
D. Reading a sign that’s far away
Which of the following parts of the eye is NOT transparent (clear)?
A. The lens
B. The cornea
C. The vitreous humor
D. The sclera
Which part of the eye lays flat against the back of the eye and translates light signals into action potentials?
A. the optic nerve
B. the retina
C. the sclera
D. the lens
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