Iris & Pupil

Q. The area of the retina in the human eye which contains only cone cells is known as ________ .

1. blind spot
2. yellow spot
3. optic disk
4. cornea

Q. The adjustment of the size of regulates the amount of light entering the eye.

1. ciliary body
2. pupil
3. cornea
4. sclera

Q.

The colour of the iris in all people around the world is not the same because of

1. difference in the light intensity

2. presence of radial muscles in the iris

3. difference in the size of iris

4. difference in the type of melanin

Q.

Choose the correct function of ciliary muscles.

1. Change the shape of the lens

2. Cover and protect the cornea

3. Carry signals to the brain

4. Regulate the size of the pupil

Q.

Which of the following is responsible for fine focusing?

1. Lens

2. Ciliary body

3. Ciliary muscle

4. Cornea

Q.

Which of the following is responsible for focusing light?

1. Lens

2. Ciliary body

3. Ciliary muscle

4. Cornea

Q.

The part of the eye that controls the amount of light entering the eye.

1. Pupil

2. Iris

3. Ciliary muscles

4. Lens

Q. mention the name of the structurefound in human eye that control size of pupil