Question

The human eye can focus on objects at different distances by adjusting the focal length of the eye lens. This is due to

• A. Presbyopia
• B. Accommodation
• C. Near-sightedness
• D. Far-sightedness

Answer 1

The correct option is B

Accommodation

The correct option is B

Explanation of the correct option:

1. The process by which the eye adjusts its optical power to keep a clean image or maintain focus on an object as its distance changes are known as accommodation.
2. In other words, accommodation refers to the mechanism by which the human eye can focus things at various distances by varying the focal length of the eye lens.
3. The eye lens is flattened or made thicker to produce this change in focal length.
4. The three more possibilities are merely various circumstances in which the human eye is unable to focus on an item.

Explanation of the incorrect option:

Option A:

1. The gradual decrease of your eyes' capacity to focus on adjacent things is known as presbyopia.
2. Presbyopia, a form of long-sightedness brought on by the lens of the eye's loss of flexibility.
3. It's a normal, frequently frustrating aspect of becoming older.
4. The early to mid-40s is often when presbyopia first becomes apparent, and it gets worse until about age 65.

Option C:

1. Nearsightedness (myopia) is a shared vision issue in which you can clearly see items close to you but not those farther away.
2. Myopia, also known as nearsightedness, is an eye disorder in which parallel light rays are focused in front of the retina, allowing objects to be clearly seen only when they are close to the eye.

Option D:

1. Farsightedness (hypermetropia) is a common vision condition in which you can see far objects clearly but not nearby items.
2. Long-sightedness often referred to as farsightedness, hypermetropia, or hyperopia, is a condition of the eye in which accommodation is at rest and light is focused beyond the retina rather than on it.

Final answer: The human eye can focus on objects at different distances by adjusting the focal length of the eye lens and it is due to Accommodation.