INTACS: Support for a warped cornea and correction of myopia
In keratoconus, sometimes the main cause of poor vision is warping of the cornea. In keratoconus, the cornea starts to thin and protrude forward at a point just below its center. This results in irregularly curved corneas and high levels of astigmatism that are difficult to correct with ordinary glasses and contact lenses. To help correct this warping, small plastic ring segments, called Intacs, can sometimes help normalize the central corneal shape and improve vision by making the corneal shape more regular. Intacs can also be used to correct low levels of myopia.