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

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

• A. CR-39
• B. Polycarbonate
• C. 1.67 High-Index
• D. Trivex

Answer: (B)

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.

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.