Deliver more power in a thinner lens. Ultra high-index 1.74 lenses from Younger Optics are made from MR-174™ resin, a high-performance lens material with good processing characteristics. Younger’s expanding 1.74 availability helps you deliver high-Rx eyewear with thinner, more attractive lenses in clear, Transitions® and NuPolar® polarized. In recent months, we added 1.74 NuPolar polarized lenses in gray, as well as 1.74 clear flat-top bifocals. Contact customer service for more information!