The simple idea
Focusing power (in dioptres, D = 1/focal length in metres): cornea ~43 D (two‑thirds), lens ~20 D (adjustable). Total ~60 D.
Part 10 · The Senses
Same concept, other depth: Clinical Reasoning →
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Focusing power (in dioptres, D = 1/focal length in metres): cornea ~43 D (two‑thirds), lens ~20 D (adjustable). Total ~60 D.
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