Short answerModerate1 mark
3(iii)
Study the diagram given below and answer the questions that follow:
Identify the defect of the eye by mentioning the technical term.
Topic: Hypermetropia
Previous-year question practice database
Answer
Exam answer
HYPERMETROPIA (long-sightedness or hyperopia).
Explanation
In hypermetropia the person can see DISTANT objects clearly but NEAR objects appear blurred, because the image of a near object would be focused BEHIND the retina.
Read the ray diagram to identify the defect: if the rays converge BEFORE the retina it is MYOPIA; if they would converge BEYOND it, it is hypermetropia.
The three common defects, by what the sufferer cannot see: MYOPIA — cannot see DISTANT objects (the blackboard problem) HYPERMETROPIA — cannot see NEAR objects (the reading problem) PRESBYOPIA — the same as hypermetropia but caused specifically by the AGEING of the lens
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