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- 1. Multiple Choice
What is the function of the sclera in the human eye?
It absorbs light and provides blood and nutrients.
It turns light energy into impulses to transmit to the brain.
It protects the eye and maintains its shape.
It controls the amount of light entering the eye.
- 2. Multiple Choice
Which layer of the eye is responsible for absorbing light through photoreceptors?
Sclera
Choroid
Retina
Lens
- 3. Multiple Choice
What is the primary role of the choroid in the eye?
It shapes the eye.
It absorbs light and provides blood and nutrients.
It transmits light impulses to the brain.
It protects the eye from external harm.
- 4. Multiple Choice
What is the function of the cornea in the human eye?
It regulates the amount of light entering the eye.
It processes visual information.
It allows light into the eye.
It provides color to the eye.
- 5. Multiple Choice
What role does the iris play in vision?
It allows light into the eye.
It works with the pupil to regulate light entering the eye.
It focuses the light on the retina.
It detects color.
- 6. Multiple Choice
How does the pupil respond to low light conditions?
The pupil becomes nearly closed.
The pupil does not change size.
The pupil becomes wide open.
The pupil rotates.
- 7. Multiple Choice
What happens to the pupil under high light conditions?
The pupil becomes wide open.
The pupil becomes nearly closed.
The pupil increases in color intensity.
The pupil detaches slightly.
- 8. Multiple Choice
What is the primary function of rods in the human eye?
Detection of colors
Vision in bright light
Vision in low light
Focusing on distant objects
- 9. Multiple Choice
Where are cones primarily located in the retina?
Distributed all over the retina
In the center of the retina
On the outer edges of the retina
Near the optic nerve
- 10. Multiple Choice
Which type of photoreceptor is less sensitive but responsible for detecting colors?
Rods
Cones
Bipolar cells
Ganglion cells
- 11. Multiple Choice
What is the blind spot in the human eye?
The area of the retina where the optic nerve exits and lacks photoreceptors.
The central region of the retina that provides the sharpest vision.
The outermost layer of the eye that protects it from injury.
The part of the eye that adjusts the focus of light on the retina.
- 12. Multiple Choice
Why is the blind spot in the human eye usually not noticed?
The brain ignores the signals from this area.
The brain "fills in" the missing images.
The blind spot does not affect vision clarity.
The optic nerve enhances vision in this area.
- 13. Multiple Choice
What is the primary function of the lens in the human eye?
To protect the eye from ultraviolet light
To direct light waves towards the retina
To produce tears and lubricate the eye
To detect color and brightness
- 14. Multiple Choice
Which structures control the shape of the lens in the human eye?
Optic nerve and retina
Ciliary muscles and suspensory ligaments
Cornea and sclera
Iris and pupil
- 15. Multiple Choice
As people age, the lens of the eye becomes less elastic. What is a common consequence of this change?
Improved night vision
Decreased need for glasses
Increased difficulty focusing at certain distances
Enhanced color perception
- 16. Multiple Choice
What is the function of the lens in the human eye?
To protect the eye from ultraviolet light
To focus light on the retina
To detect color
To control the amount of light entering the eye
- 17. Multiple Choice
What is the primary function of corrective lenses as described in the context of vision?
To change the color of the eyes
To protect the eyes from UV light
To refract light so it converges accurately on the retina
To increase the field of vision
- 18. Multiple Choice
What condition is caused by the eyeball being too long?
Astigmatism
Far-sightedness
Near-sightedness
Cataracts
- 19. Multiple Choice
What is the function of the aqueous humor in the human eye?
It nourishes the cornea and lens.
It controls the movement of the eyelid.
It detects light intensity.
It supports the structure of the eye socket.
- 20. Multiple Choice
Where is the vitreous humor located in relation to the lens?
In front of the lens
Behind the lens
Around the lens
Within the lens
- 21. Multiple Choice
What is the consistency of the vitreous humor?
Watery and thin
Thick and jelly-like
Hard and crystalline
Soft and fibrous
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