Accommodation for Near Vision Steps:

• Recall that focusing on near objects requires increased lens curvature for stronger refraction.
• The ciliary muscle contracts to reduce tension on suspensory ligaments.
• This allows the lens to become more convex (rounder).
• Match to option showing contraction and rounder shape.

Why D is correct:

• In accommodation, ciliary muscle contraction releases zonules, enabling elastic lens to bulge and become rounder, increasing focal power per Snell's law of refraction.

Why the others are wrong:

• A: Relaxation occurs for distant vision, thinning lens for less refraction.
• B: Contraction happens, but lens becomes rounder, not thinner.
• C: Relaxation thins lens, does not make it rounder.

Final answer: D