Question

give reasons for getting a defect in vision called hypermetropia​

Answer 1

Answer:

Cause of hypermetropia: This defect arises due to either of the following two reasons: (i) The eyeball becomes too small along its axis so that the distance between the eyelens and the retina is reduced. (ii) The focal length of the eyelens becomes too large resulting in the low converging power of the eyelens.

Answer 2

• Causes : Axial length of eyeball is too short, lens or cornea is flatter than normal, aphakia
• Risk factors :Ageing, heriditary
• Diagnostic method : Eye exam
• Differential diagnosis: Amblyopia, retrobulbar optic neuropathy, retinitis pigmentosa sine pigmento

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