Visual Defects

Q.

"Do you intend to use the services of a scribe" meaning?

Q. The minimum distance at which one can read comfortably with a normal eye is about

1. 25 cm
2. 50 cm
3. 10 cm
4. 100 cm

Q.

Your friend is having an eyesight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as non-uniform and distorted. The doctor diagnosed the problem as:

1. myopia and hypermetropia

2. astigmatism

3. Myopia with astigmatism

4. presbyopia with astigmatism

Q.

Explain Braille System? [5 MARKS]

Q.

The bifocal lenses are required to correct

1. Myopia

2. Cataract

3. Presbyopia

4. Astigmatism

Q. Which one of the following diseases is due to the low converging power of the lens?

1. Cataract
2. Hypermetropia
3. Astigmatism
4. Myopia

Q.

What is cataract and how can it be corrected. Explain with a digram?

Q.

What is cataract? Explain with diagram. How is it treated? Mention two causes.

Each point: 1 Mark
Diagram: 2 Marks

Q.

What is myopia?

Q.

A blind person can never read and write.

1. to protect the lens of the eye from dust

2. to adjust the size of pupil

Q.

Which of the following alternatives regarding the hypermetropia are correct ?

1. A person suffering from it finds it difficult to read the board at a distance

2. It is caused by increase in the size of the eyeball

3. It is caused by the decrease in the size of an eyeball

4. A person suffering from it finds difficult to read books

Q. Write a short note on how can we take care of our eyes ?

Q. What are cylindrical lenses that are used during the visual defect astigmatism and their function?

Q.

Name any one defect of the eye. How is it corrected?

Q.

What is a Braille System?

1. A device for better audio experience.
2. An algorithm for visual input to a computer.
3. A popular aid for visually challenged people.
4. It establishes a relation between an incident light and the reflected one.

Q.

Which of the following alternatives are correct regarding myopia?

1. A myopic person can see far away objects clearly

2. A myopic person can see near objects clearly

3. It can be caused when eyeball gets longer or elongated

4. It can be caused when an eyeball gets shorter or flattened

Q.

What is cataract? How can the vision of a person having cataract be stored?

Q. Braille system is a reading and writting system used by:

1. blind people
2. deaf people
3. illiterate people
4. dumb people

Q.

A person with hypermetropia can read only material kept beyond 25 cm from the eye, why?

1. Light rays from a close by the object are focused at a point beyond the retina.

2. Light rays from a nearby object are focused at a point in front of the retina.

3. Light rays from a distant object are focused at a point beyond the cornea.

4. Light rays from distant objects are focused at a point beyond the retina.

Q.

One of your friends in your class is wearing a convex lens to correct his vision. He is suffering from which of the following visual defects?

1. Iris

2. Retina

3. Cornea

4. Eye lens

Q.

Those who suffer from both myopia and hypermetropia use to wear bifocal spectacle. In this case the image is formed before retina or after retina

Q. Which of the following is/are eye defect(s)?

1. Myopia
2. Hypermetropia
3. Cataract
4. Asthma

Q.

What is astigmatism?

1. B

2. A

3. C

4. D

Q. PRESBYOPIA

Q.

Name the kind of lens required to correct myopia

Q. Match the defects of vision with an appropriate remedy .

1. Myopia
2. Hypermetropia
3. Presbyopia
4. Cataract

Q. What are the two defects of eyes in seeing near and far objects called as?
Give one correction method for each.
[4 marks]

Q.

A person cannot see the instant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision is called:

(a) hypermetropia

(b) myopia

(c) night blindness

(d) cataract

Q. Define myopia. [1 mark]

Q.

Braille script, which is used by blind persons for reading and writing, was developed by whom?

1. Louis Pasteur

2. Louis Braille​

3. Abraham Lincon
4. Alexander Fleming