Class 8 Exam > Class 8 Questions > How does the lens in the human eye adjust to ...
Start Learning for Free
How does the lens in the human eye adjust to focus on near and distant objects?
- a)By changing its shape
- b)By altering the iris size
- c)By changing the amount of light
- d)By adjusting the retina's position
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
How does the lens in the human eye adjust to focus on near and distant...
How the Human Eye Focuses
The human eye is a complex organ that adjusts to focus on objects at varying distances through a process called accommodation. The primary mechanism of this process is the ability of the lens to change its shape.
Lens Adjustment
- The lens is a flexible, transparent structure located behind the iris.
- When focusing on distant objects, the ciliary muscles relax, which causes the lens to flatten. This flatter shape allows light rays from distant objects to converge correctly on the retina.
- Conversely, when focusing on near objects, the ciliary muscles contract, causing the lens to become thicker and more rounded. This increased curvature helps bend the light rays more sharply, allowing them to focus on the retina.
Role of Other Components
- While the iris adjusts the amount of light entering the eye and helps in depth of field, it does not play a direct role in focusing on near or distant objects.
- The retina's position does not change; it is fixed at the back of the eye and captures the focused light.
Summary
- The ability of the lens to change shape is crucial for accommodating different distances.
- This process ensures that images of objects, whether near or far, are sharply focused on the retina, allowing for clear vision.
Understanding this mechanism is essential for grasping how our vision works and how we perceive the world around us.
The human eye is a complex organ that adjusts to focus on objects at varying distances through a process called accommodation. The primary mechanism of this process is the ability of the lens to change its shape.
Lens Adjustment
- The lens is a flexible, transparent structure located behind the iris.
- When focusing on distant objects, the ciliary muscles relax, which causes the lens to flatten. This flatter shape allows light rays from distant objects to converge correctly on the retina.
- Conversely, when focusing on near objects, the ciliary muscles contract, causing the lens to become thicker and more rounded. This increased curvature helps bend the light rays more sharply, allowing them to focus on the retina.
Role of Other Components
- While the iris adjusts the amount of light entering the eye and helps in depth of field, it does not play a direct role in focusing on near or distant objects.
- The retina's position does not change; it is fixed at the back of the eye and captures the focused light.
Summary
- The ability of the lens to change shape is crucial for accommodating different distances.
- This process ensures that images of objects, whether near or far, are sharply focused on the retina, allowing for clear vision.
Understanding this mechanism is essential for grasping how our vision works and how we perceive the world around us.
Free Test
FREE
| Start Free Test |
Community Answer
How does the lens in the human eye adjust to focus on near and distant...
The lens in the human eye adjusts its shape to focus on objects at varying distances. This process, known as accommodation, helps in clearly viewing both near and distant objects.
Attention Class 8 Students!
To make sure you are not studying endlessly, EduRev has designed Class 8 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 8.
|
Explore Courses for Class 8 exam
|
|
Top Courses for Class 8View all
How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer?
Question Description
How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? for Class 8 2024 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 8 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer?.
How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? for Class 8 2024 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 8 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer?.
Solutions for How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 8.
Download more important topics, notes, lectures and mock test series for Class 8 Exam by signing up for free.
Here you can find the meaning of How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice How does the lens in the human eye adjust to focus on near and distant objects?a)By changing its shapeb)By altering the iris sizec)By changing the amount of lightd)By adjusting the retina's positionCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 8 tests.
|
|
Explore Courses for Class 8 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup