Question

In presbyopia the focussing power of the lens is.... with age. (fill in the blanks).
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Answer 1

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In presbyopia the focussing power of the lens is. 10 dioptres with age.

The ability to focus on near objects declines throughout life, from an accommodation of about 20 dioptres (ability to focus at 50 mm away) in a child, to 10 dioptres at age 25 (100 mm), and levels off at 0.5 to 1 dioptre at age 60 (ability to focus down to 1–2 meters only).

Answer 2

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In presbyopia the focussing power of the lens is 10 dioptres with age.