A boy can see distant objects clearly but cannot read his textbook held at 25 cm. He suffers from:

1. He sees distant objects well, so his far point is fine. 2. He cannot see clearly at 25 cm, so his near point lies farther. 3. Pushed-back near point is the defining feature of hypermetropia. 4. Convex lenses of suitable focal length correct it. 5. So the defect is hypermetropia. _Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_