by larumd on Thu Nov 18, 2010 6:15 pm
Thank you for the post!
Both materials reference the thickness of the lens.
High Index 1.60 lenses are thinner & lighter than CR-39, polycarbonate or glass. Recommended sphere range is -/+ 4.00 through -/+ 6.00.
High Index 1.67 lenses are thinner than High Index 1.60, polycarbonate, CR-39 or glass. Recommended sphere range over -/+ 6.00.
Ultra High Index 1.74 is the thinnest & lightest plastic material. AR coating is included, recommended sphere range is 0.00 through -/+ 18.00
There are so many variables, a lot of this depends on frame style, size and your prescription. Each lens materials has the same properties as polycarbonate so anti-scratch is included and they block UV rays. AR (non-glare) coating would need to be ordered extra for most lenses except 1.74.
Give us a call at 1-800-504-5897 option 5 if you have any other questions. We are here to help!
Thank you for the post!
Both materials reference the thickness of the lens.
High Index 1.60 lenses are thinner & lighter than CR-39, polycarbonate or glass. Recommended sphere range is -/+ 4.00 through -/+ 6.00.
High Index 1.67 lenses are thinner than High Index 1.60, polycarbonate, CR-39 or glass. Recommended sphere range over -/+ 6.00.
Ultra High Index 1.74 is the thinnest & lightest plastic material. AR coating is included, recommended sphere range is 0.00 through -/+ 18.00
There are so many variables, a lot of this depends on frame style, size and your prescription. Each lens materials has the same properties as polycarbonate so anti-scratch is included and they block UV rays. AR (non-glare) coating would need to be ordered extra for most lenses except 1.74.
Give us a call at 1-800-504-5897 option 5 if you have any other questions. We are here to help!