Limbal Relaxing Incisions LRIs are placed on the far peripheral aspect of the cornea (the limbus), resulting in a more rounded cornea. Astigmatism is reduced, and uncorrected vision is improved. LRIs can correct astigmatism up to 8 diopters (D); however, the use of LRIs is routinely reserved for 0.5-4 D of astigmatism. These incisions are usually made at the time of cataract, clear lens exchange, or ICL surgery to reduce or eliminate the astigmatism and thus increase the chances for better vision without eyeglasses. LRIs can also be performed as an independent procedure in our in-office surgery suite.