Varun instead of copying from the black board use to copy regularly from the note book of his friends, Sudhir with whom he sat on the same desk. Sudhir told the teacher about it. The teacher asked Varun to check his eyes by a doctor and explained to whole class the reason why Varun copied from Sudhir's notebook.
(i) What in your view is wrong with Varun's eyes and how can it be corrected ?
(ii) If the doctor prescribes Varun to use lenses of power - 0.5 D, write the type of these lenses.
(iii) Write the values displayed by Sudhir and his teacher.