HARD
Earn 100

What are the functions of optic nerve?

Important Questions on Patterns

EASY
Why is it impossible to make out the colour of cars on the road at night?
EASY
When one enters a dim light room from bright light, one is unable to see the objects in the room for sometime. Why? 
EASY
What are rods and cones in the retina of an eye?
EASY
(a) What are light-sensitive cells? (b) Where are they found? (c) Give the functions of each.
EASY

There are two types of light-sensitive cells in the human eye. Where are they found?

EASY
What is the nature of image formed at the retina of human eye?
EASY
Why our night vision is comparatively poor compared to the night vision of an owl?
EASY
The see-through cover of the eye is called _____.
EASY
The human eye forms the image of an object at its:
MEDIUM

Draw a labelled diagram of the human eye. Label the following parts on this diagram: Cornea, Iris, Pupil, Ciliary muscles, Eye-lens, Retina, Optic nerve, Blind spot.

MEDIUM
Describe the working of the human eye.
EASY

There are two types of light-sensitive cells in the human eye: To what is each type of cell sensitive?

EASY
What happens to the size of the pupil of our eye in dim light?
MEDIUM
How the amount of light entering the eye is controlled?
EASY
How does eye adjust itself to deal with light of varying intensity?
EASY
Name the part of human eye which acts as a screen to obtain the image of object.
MEDIUM

Choose the correct answer from the bracket and fill in the blank.

(Retina/Pupil)

_____ allows light into the eye.

MEDIUM
Explain why we cannot see our surroundings clearly when we enter a darkened cinema hall from bright sunshine, but our vision improves after some time.
EASY
What is the name of transparent front part of an eye?
EASY
Mention the role of iris.