Shyam views a certain object and finds that it is not properly visible to him.Its image is formed by his eye lens 3 cm away from the pupil of his eye.what kind of lens should Shyam use to correct this defect in his vision?

When image is formed 3 cm  away from the pupil that means image is formed before the retina and this defect is called Myopia.
This defect ca be correct by using concave lens. 

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