write a short note on three defects of eye
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Myopia : (Near-sightedness) The person with Myopia can clearly see things situated closer to the eye. But he won't be able to see things at a further distance.
Reason : Elongation of eyeball.
Hypermetropia : (Far-sightedness) The person with Hypermetropia can clearly see things situated at further distances. But he won't be able to see things at a closer distance.
Reason : Eyeball has become too small.
Presbyopia : (Both conditions occur simultaneously) A person with Presbyopia won't be able to see things at a closer distance as well as further distances. i.e, He suffers from both Myopia as well as Hypermetropia.
Reason : Usually associated with old age.
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