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WorksheetsIS_Unit10_Checkpoint 10.5_E
Total questions: 18
Worksheet time: 6mins
[E] 1(a) What is the problem of short sight?
Cannot see distant objects clearly
Cannot see near objects clearly
[E] 1(b) What are the causes of short sight?
The lens is too thick or the eyeball is too long.
The lens is too thick or the eyeball is too short.
The lens is too thin or the eyeball is too long.
The lens is too thin or the eyeball is too short.
[E] 1(c) Short sight can be corrected by wearing
glasses with convex lenses
glasses with concave lenses
[E] 1(d) What is the problem of long sight?
Cannot see distant objects clearly
Cannot see near objects clearly
[E] 1(e) What are the causes of long sight?
The lens is too thick or the eyeball is too long.
The lens is too thick or the eyeball is too short.
The lens is too thin or the eyeball is too long.
The lens is too thin or the eyeball is too short.
[E] 1(f) Long sight can be corrected by wearing
glasses with convex lenses
glasses with concave lenses
[E] 1(g) What is the problem of astigmatism?
Cannot see distant objects clearly
Cannot see near objects clearly
Blurred vision
Cannot distinguish between colours
[E] 1(h) What is the cause of astigmatism?
The cornea or the lens is unevenly curved.
The lens becomes cloudy.
One or more types of cone cells not working properly.
[E] 1(i) Astigmatism can be corrected by
wearing glasses with specially made lenses.
replacing the lens with an artificial lens.
It cannot be corrected.
[E] 1(j) What is the problem of cataract?
Cannot see distant objects clearly
Cannot see near objects clearly
Blurred vision
Cannot distinguish between colours
[E] 1(k) What is the cause of cataract?
The cornea or the lens is unevenly curved.
The lens becomes cloudy.
One or more types of cone cells not working properly.
[E] 1(l) Cataract can be corrected by
wearing glasses with specially made lenses.
replacing the lens with an artificial lens.
It cannot be corrected.
[E] 1(m) What is the problem of colour-blindness?
Cannot see distant objects clearly
Cannot see near objects clearly
Blurred vision
Cannot distinguish between colours
[E] 1(n) What is the cause of colour-blindness?
The cornea or the lens is unevenly curved.
The lens becomes cloudy.
One or more types of cone cells not working properly.
[E] 1(o) Colour-blindness can be corrected by
wearing glasses with specially made lenses.
replacing the lens with an artificial lens.
It cannot be corrected.
[E] 2(a) What TWO eye defects does Mr. Chan have?
Astigmatism, short sight
Astigmatism, long sight
Cataract, short sight
Cataract, long sight
[E] 2(b) Which type(s) of lenses does Mr. Chan need to correct his eye defects?
Concave lenses
Lenses that have different curvatures at different points
Both of them
3. Which of the following is NOT a good habit to protect our eyes?
Wearing safety goggles during experiments
Looking at smartphone screens for long periods of time
Having regular eye check-ups
Wearing sunglasses when going outdoors on a sunny day
