least distance of distinct vision

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Q1.Name the part of the human eye that helps in changing the focal length of the eye lens.
Ans:Ciliary muscles

Q2.The human eye forms the image of an object at its:
Ans:Retina

Q3.The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is called:
Ans:Accommodation

Q4.Least distance of distinct vision:
Ans:25cm

Q5.Condition in which image is formed behind retina is called:
Ans:Farsightedness

Q6. Condition in which image is formed in front of retina is called:
Ans:Nearsightedness

Q7.Short Sightedness can be corrected by using:
Ans:Diverging glasses

Q8.Far sightedness can be corrected by using:
Ans:Converging glasses

Q9.What is the nature of the image formed on the retina:
Ans:Real, inverted and diminished image

Q10.How is the amount of light entering the eyes controlled:
Ans:Iris

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