The Human Eye Overview

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What is the function of the iris in the human eye?

To identify objects by their smell

To form an image on the retina

To control the size of the pupil (correct)

To enable us to see colors

What is the role of the cornea in the human eye?

To enable us to identify colors

To control the size of the pupil

To form an image on the retina

To let light enter the eye (correct)

How does the human eye function in comparison to a camera?

It identifies objects by their smell

It provides adjustment of focal length required to focus objects

It forms an image on a light-sensitive screen called the retina (correct)

It controls the size of the pupil

Which sense organ is considered the most significant, according to the text?

The human eye Signup and view all the answers

What is the main function of the crystalline lens in the human eye?

To provide finer adjustment of focal length required to focus objects on the retina Signup and view all the answers

What enables us to see the wonderful world and colors around us, according to the text?

The human eye Signup and view all the answers

What is the membrane called that has an enormous number of light-sensitive cells?

Retina Signup and view all the answers

What is the process called by which the brain interprets the electrical signals sent via optic nerves?

Interpretation Signup and view all the answers

What enables us to see distant objects clearly?

Relaxation of ciliary muscles Signup and view all the answers

What is the minimum distance at which objects can be seen most distinctly without strain called?

Least distance of distinct vision Signup and view all the answers

What is the condition called when the crystalline lens of old individuals becomes milky and cloudy?

Cataract Signup and view all the answers

Which refractive defect is also known as near-sightedness?

Myopia Signup and view all the answers

What can correct the refractive defect of myopia or near-sightedness?

Suitable spherical lenses Signup and view all the answers

What is the condition called when the eye gradually loses its power of accommodation?

Presbyopia Signup and view all the answers

For a normal adult with normal vision, what is the farthest point upto which the eye can see objects clearly called?

"Far point" of the eye Signup and view all the answers

What can cause partial or complete loss of vision due to a milky and cloudy crystalline lens in old individuals?

Cataract Signup and view all the answers

The Human Eye Overview

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