<TED Worksheet>
15. What are those floaty things in your eye
Michael Mauser
<3:51>   December 2014

 

Questions
(PDF)   (Word)

Answers
(PDF)   (Word)

Trascript

 

 

≪Questions:What are those floaty things in your eye?≫
1. Sometimes you see something swimming in your field of vision, and it may look like a tiny worm or a transparent blob. What is it known as?

 

2. What does Muscae volitantes mean in English?

 

3. Floaters are tiny objects that cast shadows on the retina, the light-sensitive tissue at the back of your eye. What can they be? (List two)

 




4. Fill in the blanks.
Floaters may be barely distinguishable most of the time, but they become more

(1)_______________ when they are

closer to the (2)_______________ .

And they are particularly noticeable when you are looking at

a(3)______________ (3 words),

like a blank computer screen, (4)_______________, or a

(5)__________(2 words),

where the consistency of the background makes them easier to distinguish.

 

5. The following paragraph describes the blue field entopic phenomenon. Fill in the blanks.

In some ways, this is the (1)_______________

of seeing floaters because you are not seeing

(2)_______________,

but little moving windows letting (3)_______________

through to your (4)_______________.

The windows are caused by

(5)__________________ (3 words)

moving through the capillaries along your retina’s surface.

These leukocytes can be so (6)_______________

that they nearly fill a capillary causing a

(7)_________________ (2 words)

to open up in front of them.

Because the space and the white blood cells are both more transparent to

(8)_________________ (2 words)

than the

(9)_________________ (3 words)

normally present in capillaries,

we see a moving dot of light wherever this happens,

following the paths of your capillaries and moving in time with your pulse.




6. In the blue field entopic phenomenon, you sometimes see what looks like a dark tail following the dot. Why does this happen?

 

 

 

7. Floaters are often unnoticeable. Why?

 

 

 

8. What does the speaker suggest if we experience abnormally numerous or large floaters that interfere with vision.

 

 

9. Choose the best answer that the speaker may agree with.
a. The cause of floaters and the blue field entopic phenomenon are the same.
b. We should make a science museum which will allow us to see the blue sky sprites more clearly.
c. Entopic phenomena, such as floaters and blue sky sprites are not too harmful.
d. Our biology and our minds have nothing to do with what we see every day.




===============
≪Answers:What are those floaty things in your eye?≫
1. Sometimes you see something swimming in your field of vision, and it may look like a tiny worm or a transparent blob. What is it known as?
Floaters (Muscae volitantes)

 

2. What does Muscae volitantes mean in English?
Flying flies, or eye floaters

 

3. Floaters are tiny objects that cast shadows on the retina, the light-sensitive tissue at the back of your eye. What can they be? (List two)
(You have to list two of them) Bits of tissue, red blood cells, or clumps of protein.

 




4. Fill in the blanks.
Floaters may be barely distinguishable most of the time, but they become more

(1)___visible_____ when they are

closer to the (2)____retina_____ .

And they are particularly noticeable when you are looking at

a (3)_uniform bright surface_(3 word),

like a blank computer screen, (4)____snow___, or a

(5)___clear sky____ (2 words),

where the consistency of the background makes them easier to distinguish.

 

5. The following paragraph describes the blue field entopic phenomenon. Fill in the blanks.

In some ways, this is the (1)____opposite___

of seeing floaters because you are not seeing

(2)__shadows_____, but little moving windows

letting (3)__light_____ through to your

(4)__retina____.

The windows are caused by

(5)___white blood cells___ (3 words)

moving through the capillaries along your retina’s surface.

These leukocytes can be so (6)___large___ that

they nearly fill a capillary causing a

(7)___plasma space__ (2 words)

to open up in front of them.

Because the space and the white blood cells are both more transparent to

(8)__blue light___   (2 words) than

the (9)_red blood cells_ (3 words)

normally present in capillaries,

we see a moving dot of light wherever this happens,

following the paths of your capillaries and moving in time with your pulse.




6. In the blue field entopic phenomenon, you sometimes see what looks like a dark tail following the dot. Why does this happen?
Because the red blood cells bunch up behind the leukocyte (white blood cell).

 

7. Floaters are often unnoticeable. Why?
Because our brain learns to ignore them.
 

 

8. What does the speaker suggest if we experience abnormally numerous or large floaters that interfere with vision.
We need immediate medical treatment.
 

 

9. Choose the best answer that the speaker may agree with.

a. The cause of floaters and the blue field entopic phenomenon are the same.
b. We should make a science museum which will allow us to see the blue sky sprites more clearly.
c. Entopic phenomena, such as floaters and blue sky sprites are not too harmful.
d. Our biology and our minds have nothing to do with what we see every day.

 

========================

Click here for more TED Talks Worksheets!

========================