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

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Which lens material is the most commonly used plastic material in optical frames?

CR-39
Polycarbonate
Trivex
Cellulose Acetate

The correct answer is: Cellulose Acetate

Cellulose Acetate is the correct answer because it is the most commonly used plastic material in optical frames. Cellulose Acetate is valued for its durability, flexibility, and wide range of color possibilities, making it a popular choice for eyeglass frames. Among the other options: - CR-39 is a type of plastic lens material known for its optical clarity, but it is not commonly used for the frames themselves. - Polycarbonate is a lightweight and impact-resistant lens material, but similar to CR-39, it is not typically used for the frames. - Trivex is another lens material known for its impact resistance and clarity, but like the previous options, it is not the most commonly used plastic material for optical frames.