More Questions from Biology

Human physiology — vision defects: Myopia is associated with which condition of the eye? State the optical effect and typical correction. Choose the correct association.

General Knowledge Biology Difficulty: Easy
Choose an option
  • A
    Near-sightedness (image forms in front of the retina); corrected with concave lenses
  • B
    Far-sightedness (image forms behind the retina); corrected with convex lenses
  • C
    Loss of color perception; corrected with tinted lenses
  • D
    Poor night vision due to rod dysfunction; treated with vitamin A

Answer

Correct Answer: Near-sightedness (image forms in front of the retina); corrected with concave lenses

Explanation

Concept / ApproachMyopia = near-sightedness: parallel rays focus in front of the retina because the eyeball is too long and/or the cornea-lens system too powerful. A diverging (concave) lens moves the focal point back onto the retina.

Final AnswerNear-sightedness; corrected with concave lenses.

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