Presbyopia and Its Correction

Q.

A person is suffering from both myopia and hypermetropia. $\left(i\right)$What kind of lenses can correct this defect? $\left(ii\right)$ How are these lenses prepared?

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. hypermetropia, diverging, focusing

4. myopia, converging, diverging

Q.

Define presbyopia.

Q.

A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as shown in Figure. Which of the following could be inside the box?

Box

Q.

the near point of a hypermetropic eye is 1 m. find the power of the lens required to correct this defect. Assume that near point of normal eye is 25 m.

Q. A person who can see near objects clearly but cannot see clearly the distant objects is called hyperopia

1. True
2. False

Q.

The lens of eye losing flexibility resulting in a kind of long-sightedness in middle-aged group people.

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

1. True
2. False

Q.

What are the symptoms of presbyopia?

1. Difficulty reading fine print, particularly in low light conditions

2. Eyestrain, when reading for long periods

3. Blur at near or momentarily blurred vision when transitioning between viewing distances

4. All of these

Q.

Defect of the eye where the eye lens loses flexibility resulting in long-sightedness in elderly people.

Q.

Question 19

Which part of the eye gets affected if someone is suffering from cataract? How is it treated?