Option 1: This statement is incorrect. It states that a short-sighted person sees near objects blurred but distant objects clearly, and a convex lens is used to correct this defect. However, in reality, a convex lens is used to correct farsightedness, not shortsightedness.

Option 2: This statement is correct. A short-sighted person sees near objects clearly but distant objects are blurred. To correct this defect, a concave lens is used. The concave lens helps diverge the incoming light rays, allowing them to focus properly on the retina.

Option 3: This statement is incorrect. It states that a short-sighted person sees near objects blurred but distant objects clearly, and a concave lens is used to correct this defect. However, a concave lens actually worsens shortsightedness by further diverging the light rays, making the distant objects even more blurred.

Option 4: This statement is incorrect. It states that a short-sighted person sees near objects clearly but distant objects blurred, and a convex lens is used to correct this defect. However, as mentioned earlier, a convex lens is used to correct farsightedness, not shortsightedness.

In conclusion, option 2 is the correct statement. A short-s