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T H E H U M A N E Y E
A N D T H E
C O L O U R F U L W O R L D
QUIZ TIME !
Page 2


T H E H U M A N E Y E
A N D T H E
C O L O U R F U L W O R L D
QUIZ TIME !
N A M E T H E P A R T S O F
T H E E Y E
Page 3


T H E H U M A N E Y E
A N D T H E
C O L O U R F U L W O R L D
QUIZ TIME !
N A M E T H E P A R T S O F
T H E E Y E
L e n s
I r i s
C h o r o i d
O p t i c N e r v e
V i t r e o u s H u m o r
C o r n e a
R e t i n a
S c l e r a
C i l i a r y M u s c l e s 
P A R T S O F T H E E Y E
Page 4


T H E H U M A N E Y E
A N D T H E
C O L O U R F U L W O R L D
QUIZ TIME !
N A M E T H E P A R T S O F
T H E E Y E
L e n s
I r i s
C h o r o i d
O p t i c N e r v e
V i t r e o u s H u m o r
C o r n e a
R e t i n a
S c l e r a
C i l i a r y M u s c l e s 
P A R T S O F T H E E Y E
WHAT IS
VITREOUS
HUMOR?
V i t r e o u s H u m o r
Page 5


T H E H U M A N E Y E
A N D T H E
C O L O U R F U L W O R L D
QUIZ TIME !
N A M E T H E P A R T S O F
T H E E Y E
L e n s
I r i s
C h o r o i d
O p t i c N e r v e
V i t r e o u s H u m o r
C o r n e a
R e t i n a
S c l e r a
C i l i a r y M u s c l e s 
P A R T S O F T H E E Y E
WHAT IS
VITREOUS
HUMOR?
V i t r e o u s H u m o r
V I T R E O U S
H U M O R
T h e v i t r e o u s h u m o r
i s t h e t r a n s p a r e n t
g e l t h a t g i v e s t h e
e y e i t s s h a p e .
V i t r e o u s H u m o r
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FAQs on Quiz PPT: Human Eye and the Colourful World - Science Class 10

1. What is the structure and function of the human eye?
Ans. The human eye is a complex organ that consists of various parts, each playing a crucial role in vision. The main components include the cornea, lens, iris, retina, and optic nerve. The cornea and lens focus light onto the retina, where photoreceptor cells (rods and cones) convert light into electrical signals. These signals are then transmitted to the brain via the optic nerve, allowing us to perceive images. The iris controls the size of the pupil, regulating the amount of light that enters the eye.
2. How do we perceive colors through the human eye?
Ans. Color perception in the human eye is primarily the result of the activity of cone cells located in the retina. There are three types of cones, each sensitive to different wavelengths of light: short (blue), medium (green), and long (red). When light of different wavelengths hits these cones, it triggers a response that is interpreted by the brain as specific colors. The combination of signals from these three types of cones allows us to perceive a wide spectrum of colors.
3. What is the role of the lens in the human eye?
Ans. The lens of the human eye is a transparent, flexible structure that helps to focus light on the retina. It changes shape to adjust the focus for objects at varying distances, a process known as accommodation. When viewing distant objects, the lens flattens; when focusing on nearby objects, it becomes more rounded. This ability to change shape is essential for clear vision at different distances.
4. What are some common eye disorders and how do they affect vision?
Ans. Common eye disorders include myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and cataracts. Myopia causes difficulty seeing distant objects clearly, while hyperopia makes close objects appear blurry. Astigmatism results from an irregularly shaped cornea or lens, leading to distorted vision. Cataracts involve the clouding of the lens, resulting in blurred vision and increased sensitivity to glare. Each of these conditions can significantly impact daily activities and quality of life.
5. How does light travel through the eye and contribute to vision?
Ans. Light enters the eye through the cornea, which refracts (bends) it. It then passes through the pupil, whose size is controlled by the iris, and reaches the lens. The lens further refracts the light, focusing it onto the retina at the back of the eye. The retina contains photoreceptor cells that convert light into electrical signals, which are sent to the brain via the optic nerve. The brain processes these signals to create the images we see, allowing us to interpret our colorful world.
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