Eye Diseases and Taking Care of Our Eyes

Q.

Which of the following eye defect occurs due to the loss in flexibility of lens over time?

1. Presbyopia

2. Astigmatism

3. Myopia

4. Hypermetropia

Q.

Defect of the eye due to which one plane of an object appears in focus while other plane is out of focus, is called

1. Myopia

2. Hypermetropia

3. Astigmatism

4. None of these

Q.

Give one difference between the Myopia and Hypermetropia on the basis of lens used.

Q.

The following diagram represents a certain defect of vision of the human eye. Name the defect.

1. Hyperopia

2. Night-blindness

3. Myopia

4. Colour blindness

Q.

Name the kind of lens required to correct myopia.

Q. Which among the following is an eye defect?

1. Leprosy
2. Glaucoma
3. Measles
4. Chickenpox

Q.

Which of the following is the reason for colour blindness?

1. Genetic defect

2. Heat

3. Rupture of the eyeball

4. Temperature change

Q.

Name the process/term for the following statements:

The eye defect caused due to the shortening of the eyeball from front to back.

Q.

Name any four diseases of the eyes. [2 Marks]

Q. Match the disorders of the eye with the type of lens used for their correction.

1. Cylindrical lens
2. Concave lens
3. Convex lens

Q. Shape of the eyeball doesn't affect the vision.

1. True
2. False

Q.

Analyse the statement and identify the defect of eye.
A student is not able to see the text written on the blackboard while sitting in the last row.

1. Myopia

2. Hypermetropia

Q.

In myopia, the image is formed

1. Before the retina

2. On the retina

3. Beyond the retina

4. On the blind spot

Q. The condition of the eye where the distant objects appear blurry, while close objects appear normal is called:

1. Hypermetropia
2. Night blindness
3. Xerophthalmia
4. Myopia