Defects of Vision
Physics ⇒ Light and Optics
Defects of Vision starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Defects of Vision.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
A person can see distant objects clearly but not nearby objects. Which defect of vision does the person have?
A person complains of blurred vision when reading but can see distant objects clearly. Which lens should be prescribed?
A person has both myopia and hypermetropia. What type of lens is used to correct this condition?
Describe how bifocal lenses help in correcting presbyopia.
Explain the cause of hypermetropia and how it is corrected.
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.
Name the defect of vision in which the image of a distant object is formed in front of the retina.
Which of the following defects can be present together in the same person?
(1) Myopia and Hypermetropia
(2) Hypermetropia and Presbyopia
(3) Myopia and Astigmatism
(4) All of the above
Which of the following is a symptom of presbyopia?
(1) Difficulty in seeing distant objects
(2) Difficulty in seeing nearby objects
(3) Blurred vision for both near and far objects
(4) Double vision
Which of the following is NOT a cause of myopia?
(1) Elongation of the eyeball
(2) Increase in the focal length of the eye lens
(3) Decrease in the focal length of the eye lens
(4) Excessive curvature of the cornea
Which of the following is NOT a defect of vision?
(1) Myopia
(2) Hypermetropia
(3) Astigmatism
(4) Cataract
Astigmatism is caused due to the ________ shape of the cornea or lens.
Myopia is also known as ________.
Presbyopia is commonly seen in ________ people.
The inability of the eye to focus both near and distant objects due to loss of elasticity of the lens is called ________.
True or False: A person with hypermetropia has a near point farther than 25 cm.
True or False: Astigmatism can be corrected using cylindrical lenses.
True or False: Hypermetropia can be corrected using a concave lens.
True or False: Presbyopia can be corrected using only convex lenses.
