The value of “least distance of distinct vision” at old age ………………..

Correct Answer - 35

Correct option is  A) 25 cm

Correct option is  D) 7 to 8 cm

D) X is false, Y is true

Correct option is  C) 2.27 cm

D) between 2.27 cm to 2.50 cm

D) Angle of vision and least distance of distinct vision are same for all persons

B) hypermetropia

C) beyond the retina

Let the present age of Shikha be ‘a’ years.  Given, product of Shikha’s age five years ago and her age 8 years later is 30  ⇒ (a – 5)(a + 8) =...