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BIO NMDCAT Receptors
nmdcat.online July 7, 2026

The structural component of the eye that provides the greatest overall refractive power for focusing light onto photoreceptors is the

A. Lens
B. Cornea
✓
C. Aqueous humor
D. Vitreous humor

📝 Explanation

While the lens provides adjustable focus (accommodation), the cornea has a fixed curvature and the largest difference in optical density compared to air, providing about 70-80% of the eye's total refractive power.

📖 Additional Information

  • Lens
  • Cornea
  • Aqueous humor
  • Vitreous humor

While the lens provides adjustable focus (accommodation), the cornea has a fixed curvature and the largest difference in optical density compared to air, providing about 70-80% of the eye's total refractive power.

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