CBSE 2025 · Region 3 · Set 3 · Q31 · 3 marks
A person is suffering from an eye defect in which the far point of the eye is much nearer than infinity. Name the defect of vision the person is suffering from. List two main causes of this defect. Write the type of the corrective lens and draw a ray diagram to show the function of the corrective lens.
Marking-scheme solution
Myopia /Shortsightedness
Causes :
(i) Excessive curvature of the eye lens
(ii) Elongation of the eye ball
Diverging lens/concave lens
The Human Eye and the Colourful WorldDefects of Vision and their CorrectionUnderstandshort_answermedium
More from The Human Eye and the Colourful World
- A person allowed a narrow beam of white light from the sun to enter a dark room through a small aperture and…2025 · asked 3×
- Give reasons: (i) The sky appears dark to passengers flying at very high altitude. (ii) 'Danger' signal…2025 · asked 3×
- A student has difficulty in reading his textbooks but can read the blackboard clearly while sitting in the…2025 · asked 3×
- The students in a class took a thick sheet of cardboard and made a small hole in its centre. Sunlight was…2025 · asked 3×
- Draw a ray diagram to show the refraction of a ray of light passing through an equilateral glass prism. Mark…2025 · asked 3×
- Assertion: When ciliary muscles contract, eye lens becomes thin. Reason (R): Ciliary muscles control the…2025 · asked 2×
- A person uses lenses of +2.0 D power in his spectacles for the correction of his vision. Name the defect of…2025 · asked 2×
- When a beam of white light passes through a region of very fine dust particles, the colour of light that…2025 · asked 2×
CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.