Definition of Intrastromal corneal ring

Intrastromal corneal ring: A plastic ring that is designed to be implanted in the cornea, the transparent structure at the front of the eye, to flatten the cornea and thereby reduce the degree of nearsightedness (myopia). The ring is placed in the corneal stroma, the middle of the five layers of the cornea.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=7220
Last Editorial Review: 3/19/2012