Parts of the Eye

Q. Photosensitive compound in human eye is made up of:

1. Guanosine and Retinol
2. Opsin and Retinal
3. Opsin and Retinol
4. Guanosine and Retinol

Q.

Name a region in the retina where photoreceptor cells are absent.

Q.

The fovea is the point where visual activity is greatest. In Fovea:

1. only rods are densely packed

2. only cones are densely packed.

3. Both rods and cones are densely packed.

4. cones are more in number.

Q.

Explain the structure and functioning of the human eye. How are we able to see nearby as well as distant objects

Q.

Name the layer of the eyeball that forms the transparent cornea.

Q.

What is the term used for the photoreceptor cells of the retina which is sensitive to color?

Q.

What is the function of the cornea?

Q.

Which one of the following forms the pigmented layer in eye?

1. Choroid

2. Retina

3. Sclera

4. Fovea

Q. Identify the correct pathway

1. cornea $\to$ aqueous humour $\to$ vitreous humour $\to$ lens $\to$ retina
2. lens $\to$ cornea $\to$ aqueous humour $\to$ vitreous humour $\to$ retina
3. cornea $\to$ vitreous humour $\to$ aqueous humour $\to$ lens $\to$ retina
4. cornea $\to$ aqueous humour $\to$ lens $\to$ vitreous humour $\to$ retina

Q.

Name the part that darkens the eye from inside.

Q.

The outermost layer of the eye is choroid.

1. True
2. False

Q.

Name a layer in the walls of the eyeball which comprises blood vessels.

Q.

Macula lutea is located in

1. Middle of retina

2. Below lens

3. Below Iris

4. Below pupil

Q. Identify the parts ‘a’ ‘b’ and ‘c’ in the figure below.

1. a- sclera, b-choroid, c- retina
2. a- retina, b-choroid, c- Sclera
3. a- sclera, b-retina, c- choroid
4. a- choroid, b-retina, c- sclera

Q. Three layers in the eye ball from outside to inside are:

1. Retina, choroid, sclerotic.
2. Choroid, retina, sclerotic.
3. Sclerotic, retina, choroid.
4. Sclerotic, choroid, retina.

Q. Match the following columns and choose the correct option.
$\begin{array}{cc}ColumnI& ColumnII\\ A.Fovea& 1.Providesopeningforentryoflight\\ B.Iris& 2.TransducesRGBlight\\ C.Pupil& 3.TransmitsinformationtoCNS\\ D.Lens& 4.Controlsamountoflightentering\\ E.Opticnerve& 5.Focuseslightontheretina\end{array}$

1. A - 4 B - 1 C - 5 D - 2 E - 3
2. A - 5 B - 1 C - 4 D - 3 E - 2
3. A - 5 B - 1 C - 4 D - 5 E - 2
4. A - 1 B - 2 C - 3 D - 4 E - 5
5. A - 2 B - 4 C - 1 D - 5 E - 3

Q. The neural impulses transmitted by the optic nerve are analysed and the image formed on the retina is recognised based on earlier _______ and _______.

1. signals, impulses
2. experience, memory
3. signals, stimulus
4. experience, impulses

Q.

Which of the following is responsible for focusing light?

1. Lens

2. Ciliary body

3. Ciliary muscle

4. Retina

Q.

The eyeball is composed of _____ concentric layers.

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

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

Q. Which of the following layers of eye is devoid of blood supply?

1. Choroid
2. Retina
3. Cornea
4. Sclera

Q.

Name the process/ term for the following given statement

The clear, white front part of the eye

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

1. C-Vitreous chamber; filled with a transparent gel called vitreous humor
2. A-Retina; contains photoreceptors rods and cones
3. B-Blind spot; has only a few rods and cones
4. None of the above

Q.

Name the process/ term for the following statements:

A part of human eye which controls the amount of light entering into it.

Q. Examine the diagram of the two cell types A and B given below and select the correct option.

1. Cell-A is the rod cell found evenly all over retina.
2. Cell-A is the cone cell more concentrated in the fovea centralis.
3. Cell-B is concerned with colour vision in bright light.
4. Cell-A is sensitive to low light intensities.

Q.

Identify the following parts and match them with their functions to select the correct option_____.

1. 1 ➡ b, 2 ➡ a 3 ➡ d 4) ➡ e, 5 ➡ c

2. 1 ➡ e 2 ➡ c 3 ➡ b 4 ➡ a, 5 ➡ d

3. 1 ➡ d, 2 ➡ e, 3 ➡ a, 4 ➡ b, 5 ➡ c

4. 1 ➡ a, 2 ➡ b, 3 ➡ c, 4 ➡ d, 5 ➡ e

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