Presbyopia

Q. The bifocal lens used in the correction of presbyopia has a lens on upper side and a lens on lower side.

1. convex
2. concave
3. cylindrical
4. bifocal

Q. Presbyopia is corrected using lenses.

1. concave
2. convex
3. bifocal

Q. The aperture of a camera is analogous to the _______ of the human eye.

1. retina
2. iris
3. pupil
4. diaphragm

Q.

Which eye defect is removed using bifocal lens?

1. Myopia

2. Hypermetropia

3. Presbyopia

4. Astigmatism

Q.

Answer the following questions.

Name the defect that results when the eye loses its power of accommodation due to age.

Q.

Why do older people require glasses to read and write?

Q. Why we will use concave lens for myopia? Why not convex lens?

Q.

Presbyopia is due to the diminishing ability of:

1. ciliary muscles

2. retina

3. lens

4. iris

Q. The bifocal lens used in the correction of presbyopia has a ___ lens on upper side and a convex lens on lower side.

1. concave
2. cylindrical
3. plano-concave
4. plano-convex

Q.

Give a cause of presbyopia.

Q.

Give the biological terms for the following:

(b) Eyes lens losing flexibility resulting in a kind of long-sightedness in elderly people.

Q.

Above picture is a bi-focal lens, used to correct a presbyopic person, what is region 1 and 2?

1. Convex and Concave

2. Concave and Convex

3. Both are concave

4. Both are convex

Q. What can be the reason behind elderly people reading the newspaper keeping the paper at a distance more than the usual?

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

Q. Presbyopia is caused due to the weakening of

1. eye lens
2. ciliary muscles
3. retina
4. iris

Q. What can be the reason behind elderly people reading the newspaper keeping the paper at a distance more than the usual?

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

Q. Presbyopia is caused due to the weakening of

1. eye lens
2. ciliary muscles
3. retina
4. iris

Q. The upper part of the bifocal lens is a diverging lens used to correct the distant vision.

1. True
2. False

Q. Presbyopia is corrected using lenses.

1. concave
2. convex
3. bifocal

Q. The upper part of the bifocal lens is a diverging lens used to correct the distant vision.

1. True
2. False

Q. The bifocal lens used in the correction of presbyopia has a lens on upper side and a lens on lower side.

1. concave
2. cylindrical
3. bifocal
4. convex

Q. A bi-focal lens can be used to correct:

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

Q. Choose the incorrect statement among the following:

1. A person with myopia can see the nearby object clearly
2. A person with hypermetropia can see the distant object clearly
3. A person with presbyopia can see the nearby object comfortably but not the distant object
4. Iris is a dark muscular diaphragm that controls the size of the pupil

Q.

Gradual weakening of ciliary muscles with age causes:

1. Myopia

2. Hypermetropia

3. Presbyopia

4. cataract

Q.

A bifocal lens is used for the correction of ____. The upper part of the bifocal lens is a ____ lens and the lower part is ____.

1. presbyopia, converging, diverging

2. presbyopia, diverging, converging

3. myopia, converging, diverging

4. hypermetropia, diverging, focusing