American Board of Opticianry (ABO) Practice Test

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Practice this question and more.

What characteristic is measured by the weight of a lens in optometry?

  1. A. Lens color

  2. B. Lens size

  3. C. Lens material

  4. D. Lens density

The correct answer is: D. Lens density

The weight of a lens is measured by its density in optometry. It is not related to its color, size, or material. Some lenses may have the same size but different weights due to their varying densities. Similarly, lenses made from the same material may have different densities depending on their size. Therefore, the weight of a lens cannot be accurately determined by its color, size, or material, but rather by its density.

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