Which lens material is recommended for low prescriptions, up to 3.00 diopters?

Prepare for the Costco Optical Department Test. Use flashcards and multiple-choice questions with hints and explanations. Excel in your exam with confidence!

The recommended lens material for low prescriptions, such as those up to 3.00 diopters, is CR-39. CR-39 is a standard plastic lens material known for its lightweight nature, affordability, and excellent optical clarity, making it an ideal choice for lower prescriptions.

While polycarbonate and Trivex materials are both impact-resistant and thinner than standard plastic, they are generally suggested for stronger prescriptions or for patients who require extra durability, such as children or those with active lifestyles. High-index 1.67 lenses are typically recommended for higher prescriptions because they are thinner and lighter than CR-39, thereby reducing the thickness of the lens for those with stronger corrections.

For low prescriptions, CR-39 offers sufficient optical quality and comfort, along with being cost-effective, making it the most practical choice in this scenario.

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