Intrastromal corneal rings; a non-laser refractive surgical option for low degrees of nearsightedness

Two clear, ultra-thin, precision-engineered crescents, each with an arc length of 150º, that can be placed in the periphery of the cornea of the eye to correct myopia. Placed outside of the central optical zone, Intacs are designed to reshape corneal curvature without cutting or removing tissue from the optical zone, which is the critical area for clear vision. This subtle reshaping is intended to make nearsighted corneas flatter, thereby correcting vision. In the United States, Intacs have been approved for commercial use by the Food and Drug Administration.

Form of surgery where semi-circular devices are implanted into the cornea. They are used to help correct poor vision.