Human Eye and Vision
Physics ⇒ Light and Optics
Human Eye and Vision starts at 8 and continues till grade 12.
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See sample questions for grade 11
A person can see objects clearly only when they are between 50 cm and 200 cm from his eye. What defect of vision does he have?
Describe the process of image formation in the human eye.
Explain why a person with astigmatism cannot see both horizontal and vertical lines clearly at the same time.
Explain why a person with myopia cannot see distant objects clearly.
A person can see objects clearly only when they are between 50 cm and 200 cm from his eye. What defect of vision does he have?
A person with hypermetropia has a near point at 75 cm. What is the power of the lens required to correct this defect so that the near point is at 25 cm?
If the power of a lens required to correct a myopic eye is -2.0 D, what is the focal length of the lens?
The eye lens forms a sharp image on the retina when the object is at a distance of 1 m. If the focal length of the lens is 0.9 m, is the image formed in front of, on, or behind the retina?
The blind spot in the human eye is the region where: (1) No rods and cones are present (2) Only rods are present (3) Only cones are present (4) Maximum vision occurs
The far point of a normal human eye is at: (1) 25 cm (2) 50 cm (3) Infinity (4) 100 cm
The image formed on the retina of a normal human eye is: (1) Real and inverted (2) Virtual and erect (3) Real and erect (4) Virtual and inverted
What is the typical value of the least distance of distinct vision for a normal human eye? (1) 10 cm (2) 25 cm (3) 50 cm (4) 100 cm
The ability of the eye to focus on both near and distant objects by changing the shape of its lens is called __________.
The inability of the eye to focus different colors at the same point is called __________.
The minimum distance at which the eye can see objects clearly without strain is called the __________ distance.
The region of the retina where the image is the sharpest is called the __________.
True or False: Rod cells in the retina are responsible for color vision.
True or False: The ciliary muscles help in changing the focal length of the eye lens.
True or False: The lens of the human eye is a converging lens.
True or False: The lens used to correct myopia is thicker at the center than at the edges.
