Rigid gas permeable lens
A rigid gas-permeable lens, also known as an RGP lens, GP lens, or colloquially, a hard contact lens, is a rigid contact lens made of oxygen-permeable polymers. Initially developed in the late 1970s, and through the 1980s and 1990s, they were an improvement over prior 'hard' lenses that restricted oxygen transmission to the eye.
![](../I/KC-lens.jpg.webp)
Rigid gas-permeable (RGP) lens
Rigid lenses are able to replace the natural shape of the cornea with a new refracting surface. This means that a regular (spherical) rigid contact lens can provide good level of vision in people who have astigmatism or distorted corneal shapes as with keratoconus. However, they require a period of adaptation before full comfort is achieved.[1]
References
- Terry, Robert; Schnider, Cristina; Holden, Brien A. (October–December 1989). "Rigid Gas Permeable Lenses and Patient Management". Eye and Contact Lens Science and Clinical Practice. Contact Lens Association of Ophthalmologists. 15 (4): 305–309. PMID 2680164.
External links
![](../I/Commons-logo.svg.png.webp)
Wikimedia Commons has media related to Contact lens.
- What Are GP Contact Lenses? by Contact Lens Manufacturers Association (CLMA)
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.