Cornea

Q. When light rays enter the eye, most of the refraction occurs at the:

1. Crystalline lens
2. Iris
3. Pupil
4. Outer surface of cornea

Q.

What is the least distance of distinct vision of a normal human eye?

Q.

The dark muscular diaphragm that controls the size of the pupil is the

1. Ciliary muscle

2. Aqueous humour

3. Iris

4. Cornea

Q.

When light rays enter the eye, most of the refraction occurs at the

1. crystalline lens

2. outer surface of the cornea

3. iris

4. pupil

Q.

Which is the transparent front part of the human eye?

1. Iris

2. Pupil

3. Retina

4. Cornea

Q. Light enters our eyes through a thin membrane known as the cornea.

1. True
2. False

Q.

The human eye act as ___ lens.

1. Convex
2. Concave
3. Bifocal
4. Multifocal

Q. Draw ray diagrams each showing (i) myopic eye and (ii) hypermetropic eye.

Q. what is the diameter (cm) of eyeball in normal adult eye

Q. Where does most of the refraction of light occur in the human eye?

1. Iris
2. Pupil
3. Cornea
4. Retina

Q.

When light enters into a human eye which is the first part of eye through which the light passes.

1. retina

2. cornea

3. lens

4. pupil

Q. Where does the greatest degree of refraction of light occur in the eye ?

Q.

Which of the following forms a transparent bulge on the front surface of the eye?

1. retina

2. pupil

3. iris

4. cornea

Q. Name two parts of the eye which refract light rays (or bend light rays) .

Q.

The aperture in the eye through which light enters is the

1. Pupil

2. Conjunctiva

3. Ciliary muscles

4. Choroid

Q. When light enters our eyes, the first refraction of light takes place at?

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

Q.

Outermost transparent layer seen in front of the eyeball.

Q. The liquid present between the cornea and the pupil is known as aqueous humor.

1. True
2. False

Q. If our human eye can see only 576 mega pixels images than why we make cameras more than 1000 mega pixels ?in camera also we can only se about 576 mega pixels only then why we make cameras which have more pixels than our eye?

Q. Draw ray diagrams each showing (i) myopic eye and (ii) hypermetropic eye.

Q. What type of lens do the human eye have?

1. Biconvex
2. Biconcave
3. Plano concave
4. Plano convex

Q.

In the process of light entering our eye and forming an image at retina, at which interface the maximum refraction takes place?

1. At air - cornea interface

2. At cornea- aqueous humour interface

3. At lens - vitreous humour interface

4. At pupil - lens interface

Q. Question 12
When light rays enter the eye, most of the refraction occurs at the

(a) crystalline lens
(b) outer surface of the cornea
(c) iris
(d) pupil

Q.

In the process of light entering our eye and forming an image at retina, at which interface the maximum refraction takes place?

1. At air - cornea interface

2. At cornea- aqueous humour interface

3. At lens - vitreous humour interface

4. At pupil - lens interface

Q. What are the properties of images formed on human retina?

1. Colourful
2. Erect
3. Virtual
4. Focussed
5. Highly enlarged
6. Black and white
7. Real
8. Highly diminished
9. Inverted

Q.

Through which of the following primary interface of an eye does the light enter?

1. Cornea

2. Lens

3. Pupil

4. Retina

Q.

Choose the ODD one out of the following terms given and name the CATEGORY to which the others belong:

Malleus, Cornea, Stapes, Incus

Q. The cornea is the transparent front part of the eye that covers the iris, pupil and other parts of the eye.

1. False
2. True

Q. Refraction of light in human eye occurs mostly at ___ .

Q.

Describe and explain, how are normal I can see objects link at various distances clearly.