The Back of the Eye: Structures and Functions

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

To focus light rays onto the lens

To refract light rays so that they are focused on the lens (correct)

To sense the light intensity

To detect colors and details

What is the purpose of the pupil in the human eye?

To refract light rays

To allow light rays to enter the eye (correct)

To focus light rays onto the lens

To detect colors and details

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

To sense the light intensity

To refract light rays

To focus light rays onto the retina (correct)

To detect colors and details

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

To sense the light intensity and convert it into a signal Signup and view all the answers

What is the meaning of the Greek prefix 'photo-' in the context of the human eye?

Light Signup and view all the answers

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

To convert light into electrical impulses Signup and view all the answers

What is unique about the eyes of birds, amphibians, reptiles, and fish?

They have four different types of cones Signup and view all the answers

What is the function of rods in the human eye?

To allow humans to see images in black and white or shades of gray in low light levels Signup and view all the answers

Where are rods located in the eye?

In the peripheral part of the retina, increasing in density with distance from the fovea Signup and view all the answers

What is the approximate number of rods in a single retina?

120-130 million Signup and view all the answers

What is the primary function of cones in the human eye?

To perceive colors Signup and view all the answers

What is the difference between trichromatic and dichromatic vision?

Trichromatic vision involves three types of cones, while dichromatic vision involves only two Signup and view all the answers

Where are cones mainly located in the human eye?

In the center of the retina, in the macula Signup and view all the answers

What is the approximate ratio of rods to cones in the human retina?

20:1 Signup and view all the answers

What is the unique feature of the fovea in the human eye?

It has a very large concentration of cones Signup and view all the answers

The Back of the Eye: Structures and Functions

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Questions and Answers

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

What is the purpose of the pupil in the human eye?

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

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

What is the meaning of the Greek prefix 'photo-' in the context of the human eye?

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

What is unique about the eyes of birds, amphibians, reptiles, and fish?

What is the function of rods in the human eye?

Where are rods located in the eye?

What is the approximate number of rods in a single retina?

What is the primary function of cones in the human eye?

What is the difference between trichromatic and dichromatic vision?

Where are cones mainly located in the human eye?

What is the approximate ratio of rods to cones in the human retina?

What is the unique feature of the fovea in the human eye?

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