About 50% of adults in the United States (US) use glasses or contact lenses. A quarter of those use contact lenses; 90%, soft lenses; and 10%, rigid gas-permeable (RGP) lenses. There is increasing use of scleral RGP lenses. These preferences vary around the world; for example, half the lenses fit in Germany are RGP material.
Morgan PB, Woods CA, Tranoudis IG, et al. International contact lens prescribing in 2016. Contact Lens Spectrum. 2017(1):30–35.
Nichols JJ. Contact lenses 2016. Contact Lens Spectrum. 2017;32(1):22–25, 27, 29, 55.
Excerpted from BCSC 2020-2021 series : Section 3 - Clinical Optics. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.