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Question
Which of the following is responsible for the adjustment of the size of pupil?
Options
Iris
Sclera
Lens
Choroid
Solution
Iris
Explanation:
The iris is also an extension of the choroid, partially covering the lens and leaving a circular opening in the centre, the pupil.
RELATED QUESTIONS
The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to ______.
How does the eye adjust to take account of an increase in brightness?
Why does it take some time to see objects in a dim room when you enter the room from bright sunshine outside?
List, in order, the parts of the eye through which light passes to reach the retina.
Which of the following controls the amount of light entering the eye?
(a) ciliary muscles
(b) lens
(c) iris
(d) cornea
Why does the eye-lens not have to do all the work of converging incoming light rays?
A student sitting on the last bench in the class cannot read the writing on the blackboard clearly but he can read the book lying on his desk clearly. Which of the following statement is correct about the student?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come close to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.
Mention if the following statement is true (T) or false (F) Give reason.
Ciliary muscles regulate the size of the pupil
Give scientific reason:
One can sense colours only in bright light.
Define the following:
Power of accommodation
Draw a labeled diagram of the front view of human eye.
Give Technical Term:
The nutritive layer of the eye which also presents reflection of light.
State the Function:
Aqueous humour
Choose the Odd One Out:
For a healthy human eye, the distant point is infinite distance.
Write an Explanation.
Power of accommodation
The black opening between the aqueous humour and the lens is called ____________.
______ of the eye is comparable to the film of a camera.
