Parts of the Eye

Q.

Macula lutea is located in

1. Below lens

2. Below Iris

3. Below pupil

4. Middle of retina

Q.

A three-dimensional image of an object is formed in the:

1. Optic chiasma

2. Fovea

3. Brain

4. Retina

Q.

Which of the following are responsible for refraction and focusing?

1. Cornea

2. Aqueous humour

3. Lens

4. All of these

Q. Complete the analogy w.r.t. internal structure of human eye.
Anterior portion of sclera : Cornea:: _______ : Ciliary body

1. Posterior portion of choroid
2. Posterior $\frac{2}{3}rd$ of sclera
3. Posterior $\frac{1}{3}rd$ of sclera
4. Anterior portion of choroid

Q. Iris regulates the amount of light entering the eye by controlling the size of the _______.

1. choroid
2. pupil
3. cornea
4. sclera

Q.

Which of the following is responsible for focusing light?

1. Ciliary body

2. Cornea

3. Lens

4. Ciliary muscle

Q. Charateristics character of human cornea is:

1. Blood circulation is absent in cornea
2. In old age it hardens and a white layer deposit on it, which results in cataract
3. Secreted by conjuctiva and glandular
4. It has lacrimal gland which secrete tears

Q. Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics:

1. A-Retina-contains photo receptors-rods and cones
2. B-Blind spot- has only a few rods and cones
3. C-Aqueous chamber -reflects the light which does not pass through the lens
4. D-choroid-its anterior part forms ciliary body

Q. Cornea transplant in humans is almost never rejected. This is because:

1. It is composed of enucleated cells
2. Its cells are least penetrable by bacteria
3. It has no blood supply
4. It is a non-living layer

Q. Which one of the following statements is not correct?

1. In retina the rods have the photopigments rhodopsin while cones have three different photopigments
2. Rhodopsin is the purplish red protein present in rods only
3. Retina is the light absorbing portion of visual photo pigments
4. Retinal is a derivative of Vitamin C