Intrastromal corneal ring segment

Intrastromal corneal ring segment
A pair of corneal rings after insertion into the cornea
Other names	Intrastromal corneal ring
Specialty	ophthalmology
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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.