A person cannot see objects farther than 12 m from the eye clearly

A person cannot see objects farther than 12 m from the eye clearly. Name the defect of vision he is suffering from and the lens that should be used for correction of this defect. Illustrate with the help of a diagram, how this lens will correct the defective vision?

He is suffering from Myopia. The corrective lens to be used is a Concave Lens.
The diagrams are as shown: