Chapter 8.3 - Exam Review

Question 1

The (rods/cones) of the retina are utilised for night vision or peripheral vision during the day?

Answer 1

Rods.

Question 2

It takes (30 seconds/30 minutes) for the eyes to adjust to sunlight and (30 second/30 minutes) for them to adjust to darkness?

Answer 2

• 30 seconds.

- 30 minutes.

Question 3

During daylight, because of the central location of the cones, you can see an object better by looking directly at it. To see an object more clearly at night, what is the best way to view it?

Answer 3

By looking slightly to one side of the object (off-centre).

Question 4

The (cones/rods) of the retina play the major part in the perception of colour?

Answer 4

Cones.

Question 5

A ventilation passage which connects the middle ear to the back of the nose is called the (semi-circular canal/Eustachian Tube)?

Answer 5

Eustachian Tube.

Question 6

The vestibular apparatus is responsible for our (hearing/balance)?

Answer 6

Balance.

Question 7

What is the purpose of the Eustachian Tube?

Answer 7

To equalise pressures either side of the eardrum.

Question 8

What is the main reason why the eyes have difficulty in discerning objects at night?

Answer 8

Because rods of an eye are utilised for night vision and they are not as efficient as the cones.

Question 9

The medical for ‘short-sightedness’ is (hyperopia/myopia)?

Answer 9

Myopia.

Question 10

What is the term given to a condition where the focusing power of the eye weakens with age?

Answer 10

Presbyopia.

Question 11

The (cones/rods) of the eyes play a major part in the perception of colour?

Answer 11

Cones.

Question 12

True or False. Most colour vision deficiencies are inherited; two common types being red and green deficiency?

Answer 12

True.