Lens Correction for Short-Sightedness

Steps:

• Short-sightedness (myopia) causes distant objects to focus in front of the retina due to excessive eye length or strong lens power.
• A diverging (concave) lens spreads incoming light rays, shifting the focus point backward onto the retina.
• Verify corrections: converging lenses fix long-sightedness, not short; image inversion is standard but not "upright."
• Eliminate contradictions in other options based on optical principles.

Why D is correct:

• Myopia correction uses a diverging lens, which follows the lens formula (1/f = 1/v - 1/u) to create a virtual image that the eye then focuses on the retina.

Why the others are wrong:

• A: Normal eye images are inverted (upside down), not "inverted and upright"—the brain flips perception.
• B: Long-sightedness (hyperopia) forms distant images behind the retina, not in front.
• C: Short-sighted eyes form real (not only virtual) images in front of the retina, causing blur.

Final answer: D