Lens Thickness
All about our lens thickness
STANDARD 1.5:
These are basic lenses that have a refraction index of 1.5. They are the simplest lenses and are included in the frame price! Suitable for prescriptions of SPH (-5 to +4) and CYL (+/- 2).
POLYCARBONATE LENSES 1.59:
These lenses are thinner and lighter than conventional plastic eyeglass lenses. Polycarbonate lenses are up to 10 times more impact-resistant than regular plastic lenses thereby making these lenses an excellent choice for children’s glasses, sports eyewear and safety glasses. These lightweight lenses also offer 100% UV (ultraviolet). Suitable for prescriptions of SPH (-8 to +4) and CYL (+/- 2).
SUPER THIN 1.6:
Standard RX. These lenses contain a high index of 1.6. These lenses are most suitable for strong RX and multifocal prescription. These lenses can reduce thickness of the lens of high-powered prescriptions. They also make the lenses lighter and more comfortable. The super thin 1.67 lenses are recommended for prescription of SPH (-8 to and up).
ULTRA THIN 1.67:
These lenses contain a high index of 1.67 and can reduce thickness of the lens of high-powered prescriptions. They also make the lenses lighter and more comfortable. Most suitable for prescriptions of: SPH (-12 and up) and CYL (+/- 2).
AS THIN AS POSSIBLE 1.74:
These lenses contain a high index of 1.74 and can reduce thickness of the lens of high-powered prescriptions.
They also make the lenses lighter and more comfortable.
These lenses are recommended for prescriptions of: SPH (-12 and up) and CYL (+/- 2).
You can learn more about Lens and eye protection here.

https://express-glasses.com/pages/lens-thickness