A person must hold reading material at a distance greater than 25 cm for clear vision.
(i) What is the name of this visual defect?
(ii) Draw a ray diagram to show its correction.
(i) What is the name of this visual defect?
(ii) Draw a ray diagram to show its correction.
Show Hint
Solution and Explanation
(i) This defect is called Hypermetropia (farsightedness). It is the inability to see nearby objects clearly.
(ii) Correction: This defect is corrected using a convex lens which converges the light rays before they enter the eye so that they focus correctly on the retina.
Explanation: In hypermetropia, the image is formed behind the retina due to a short eyeball or insufficient curvature of the eye lens.
Top Questions on The Human Eye
Tara's grandmother is 70 years old and has a passion for embroidery. She faces difficulty in threading the needle as the eye of the needle appears blurred. The ophthalmologist diagnosed it as an age-related disorder.
(a) Name the eye disorder she is suffering from.
(b) How can the above defect be corrected?
(c) Where is the image formed in the above disorder?
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