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 2024 to help you excel on exam day

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What optical term refers to being twice as long as the given radius of any shape?

Effective diameter
Diopter baseline limit
Saggital value
Prism tint

The correct answer is: Saggital value

Saggital value refers to the distance between the vertex of a lens and its intersection with the optical axis. This measurement is used to determine the proper position of a lens in relation to the eye. It is not equivalent to the radius of a shape, and therefore options A, B, and D are incorrect. Effective diameter refers to the maximum visible distance through a lens and is not necessarily double the radius, so it is not the correct choice. Diopter baseline limit is a term used in medical imaging and has no relation to optical terminology. Prism tint refers to the angle of deviation from a beam of light passing through a prism, which is also not equivalent to double the radius of a shape. Therefore, the correct term for being twice the length of the radius of a shape is saggital value.