A person with short-sightedness (myopia) needs a lens that
Answer and explanation
Correct answer: B. is concave and spreads light rays before they enter the eye
- Step 1: The image forms in front of the retina; a concave lens moves the focus back.
Answer
is concave and spreads light rays before they enter the eye.
Why not the others: is convex and brings light rays together before entry: a convex lens corrects long-sightedness, not short-sightedness. is cylindrical and corrects the curvature of the cornea: a cylindrical lens corrects astigmatism. is a prism that bends light rays sideways before entry: prisms correct eye alignment problems, not short-sightedness.
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More Human systems: endocrine, nervous and reproduction questions
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