How The Eye Works
8 Questions
| Total Attempts: 187
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Questions and Answers
- 1.There are many parts to the eye, all of which have their different functions.-The lens finely focuses the light-The pupil controls how much light is let into the eye-The retina contains the rods and cones-The rods let you see black and white-The cones let you see colour-The vitreous humour is a jelly-like substance that holds the shape of the eye-The iris controls the size of the pupil-The optic nerve joins the eye to the brain, and transmits the electrical signals-The blind spot is the spot where there are no rods or cones, as it is where the optic nerve connects to the eye-The cornea is a thin layer of protective cells that also roughly focus the light-The ciliary muscles control the shape of the lens
- 2.The iris...
- A.
Detects colours.
- B.
Controls the size of the pupil.
- C.
Controls the shape of the lens.
- D.
Finely focuses the image.
- 3.What does the cornea do?
- A.
Protects the eye with transparent cells, and also roughly focuses the light.
- B.
Roughly focuses the light.
- C.
Jumbles up the light rays to be reassembled in the iris, and protects the eye with transparent cells.
- D.
Protects the eye with transparent cells.
- 4.The pupil...
- A.
Controls how far away you can see in focus.
- B.
Abosrbs light.
- C.
Lets you see black (and white).
- D.
Controls the amount of light entering the eye.
- 5.What do rods do?
- A.
Make black and white vision possible.
- B.
Make colour vision possible.
- C.
Make the image flip around.
- 6.Cones let you see in colour.
- A.
True
- B.
False
- 7.The optic nerve sends the electrical signals to the brain.
- A.
False
- B.
True
- 8.The ciliary muscles control...
- A.
The amount of light going into the eye
- B.
The rods
- C.
The lens shape
- D.
The cones
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