To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

Intrastromal corneal ring segment

From Wikipedia, the free encyclopedia

Intrastromal corneal ring segment
A pair of corneal rings after insertion into the cornea
Other namesIntrastromal corneal ring
Specialtyophthalmology

An intrastromal corneal ring segment (ICRS) (also known as intrastromal corneal ring, corneal implant or corneal insert) is a small device surgically implanted in the cornea of the eye to correct vision. Two crescent or semi-circular shaped ring segments are inserted between the layers of the corneal stroma, one on each side of the pupil,[1] This is intended to flatten the cornea and change the refraction of light passing through the cornea on its way into the eye.

Design

Intrastromal corneal ring segments have many different types and designs. Manufacturers include Intacs (US), Cornealring (Brazil), Mediphacos Keraring (Brazil),[2] Ferrara ring (Brazil),[3] Myoring (Austria)[4] and Intraseg (UK).

Medical uses

Intrastromal corneal rings were originally used to treat mild myopia.[1] For this purpose, they have largely been superseded by excimer lasers, which have better accuracy.[1] They are now mostly used to treat mild to moderate keratoconus.[1] Intrastromal corneal rings were approved in 2004 by the Food and Drug Administration for people with keratoconus who cannot adequately correct their vision with glasses or contact lenses, and for whom corneal transplant is the only other option.[5] They were approved under the Humanitarian Device Exemption,[3][6] which means the manufacturer did not have to demonstrate effectiveness. According to the FDA, these products should not be used by people who "can achieve functional vision on a daily basis using contact lenses."[5]

References

  1. ^ a b c d Rabinowitz YS (2013). "INTACS for keratoconus and ectasia after LASIK". Int Ophthalmol Clin. 53 (1): 27–39. doi:10.1097/IIO.0b013e3182774453. PMC 3653443. PMID 23221883.
  2. ^ https://mediphacos.com/keraring. {{cite web}}: Missing or empty |title= (help)
  3. ^ a b Zadnik K, Lindsley K (2014). "Intrastromal corneal ring segments for treating keratoconus (Protocol)". Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD011150.
  4. ^ "ICRS: Corneal Biomechanics Effects - EyeWiki". eyewiki.aao.org.
  5. ^ a b Food and Drug Administration (26 July 2004). "INTACS Prescription Inserts for Keratoconus - H040002". Food and Drug Administration.
  6. ^ Food and Drug Administration (9 June 2006). "Humanitarian Device Exemption (HDE)".
This page was last edited on 24 December 2023, at 07:33
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.