American Board of Ophthalmology (ABO) Practice Exam

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Prepare for the American Board of Ophthalmology Exam with expert resources. Utilize flashcards and multiple-choice questions with hints and explanations to excel in your exam.

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Which material is often used for sports eyewear due to its impact resistance?

Glass
CR-39 plastic
Polycarbonate
Trivex

The correct answer is: Polycarbonate

Polycarbonate is widely recognized for its high impact resistance, making it an ideal choice for sports eyewear. This material is significantly lighter than glass and CR-39 plastic, which enhances comfort during physical activity. Additionally, polycarbonate lenses offer a unique combination of durability and optical clarity, crucial for athletes who require clear vision in dynamic environments. Its resistance to shattering is particularly important in sports settings, where the risk of injury from flying objects or collisions is heightened. Other materials used for eyewear, such as glass, while traditionally valued for their optical quality, are more prone to shattering and can pose a safety risk in sports. CR-39 plastic, although lighter than glass, does not provide the same level of impact protection as polycarbonate. Trivex also offers good impact resistance, but polycarbonate is more widely used and recognized specifically for its applications in sports eyewear due to its well-documented performance in impact scenarios.