American Board of Opticianry (ABO) Practice Test

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Prepare for the ABO (American Board of Opticianry) Test with interactive flashcards and hundreds of multiple choice questions. Updated for 2025 to help you excel on exam day

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Which term refers to the characteristic of a minus lens?

  1. Power times 0.5

  2. The limb in conjunction with the cornea and sclera

  3. Measures vertex distance

  4. Minifies

The correct answer is: Minifies

A minus lens is a type of lens used to correct nearsightedness or myopia. The term "minifies" specifically refers to the characteristic of a minus lens to reduce the size of the image being viewed. Option A, power times 0.5, is not a commonly used term to describe minus lenses. Option B, the limb in conjunction with the cornea and sclera, does not pertain to the characteristics of a minus lens and is a reference to ocular anatomy. Option C, measures vertex distance, is a term used to determine the proper placement of lenses in glasses, but does not describe the characteristics of a minus lens. Therefore, the most accurate and relevant term to describe the characteristic of a minus lens is "minifies."