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Light (Optics) - Human Eye MCQs

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Light (Optics) - Human Eye

Light (Optics) - Human Eye MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Light (Optics) - Human Eye
What is myopia?
A. Color blindness only
B. Long-sightedness
C. Short-sightedness in which distant objects focus in front of the retina
D. Total absence of a lens
Correct Answer: C
Myopia is commonly corrected with diverging lenses.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Human Eye
Which photoreceptors are especially sensitive in dim light?
A. Rods
B. Cones only
C. Corneal cells
D. Iris cells
Correct Answer: A
Rods are highly sensitive and important for low-light vision.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Human Eye
Which photoreceptors are most responsible for color vision?
A. Lens fibers
B. Rods
C. Cones
D. Ganglion cells only
Correct Answer: C
Cones support color and high-acuity vision, especially in bright light.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Human Eye
Where is the image formed in a normal eye?
A. Iris
B. Optic nerve
C. Cornea only
D. Retina
Correct Answer: D
The retina contains photoreceptors that detect the focused image.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Human Eye
Which part controls the amount of light entering the eye?
A. Vitreous humor only
B. Iris
C. Retina
D. Optic nerve
Correct Answer: B
The iris adjusts pupil size.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Human Eye
Which part of the eye focuses incoming light onto the retina?
A. Sclera
B. Lens
C. Iris only
D. Optic nerve
Correct Answer: B
The cornea and lens refract light, with the lens fine-tuning focus.
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