Observe the diagram and answer the related questions
a. What defect is shown in the above diagram?
b. What are the reasons of this defect?
c. A person suffering from this defect cannot see ______ objects clearly.
d. How this defect can be corrected? (Diagram not expected.)
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[a]Hypermetropia (long-sightedness).
[b] It may occur when the axial length of eyeball is too short, or if the lens or cornea is flatter than normal. Changes in refractive index of lens, alterations in position of the lens or absence of lens are the other main causes.
[c] it is a common eye condition where nearby objects appear blurred, but your vision is clearer when looking at things further away.
[d] the condition of hypermetropia may be corrected with restoration of normal visual function. This may be achieved with spectacles or contact lenses. Basic principle of therapy is to converge and focus the light rays on the retina with the help of convex (plus) glasses
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