I ntrastromal corneal rings and ring segments work in accordance with the postulates of Barraquer and Blavatskaya, which state that an addition in the periphery of the cornea will result in its flattening. The thickness and diameter of the implant determine how much the cornea will be flattened. That is, the more tissue that is added (ie, ring thickness) and the smaller its diameter, the greate...

purpose : to investigate the efficacy of intacs implantation in post-lasik corneal ectasia (ple) methods : in this retrospective study, 17 eyes of 12 patients with ple, that had been implanted intacs, were evaluated. these parameters were assessed: uncorrected visual acuity (ucva), best spectacle corrected visual acuity (bscva), manifest refractive spherical equivalent (mrse), refractive cylind...

Brian S. Boxer Wachler, MD The significant findings are lamellar channel deposits and superior neovascularization. The former are benign; they do not affect corneal health but can cause cosmetic concerns. Lamellar channel deposits can sometimes cause glare if the ring segment is located close to the pupil or if the pupil is large. These deposits are more likely to occur in wide versus narrow ch...

We report a 24-year-old man with bilateral keratoconus in whom Intacs (Addition Technology, Inc.) were implanted in both eyes. The procedure was followed by Artisan toric phakic intraocular lens (Ophtec) implantation to correct the residual myopic and astigmatic refractive error.

To the Editor: We read with interest the article by Cakir and Utine1 regarding the results of combined intracorneal ring (KeraRing; Mediphacos Ltd, Belo Horizonte, Brazil) and anterior chamber, iris-fi xated, phakic intraocular lens (IOL) (Artisan/Artifl ex; Ophtec BV, Groningen, The Netherlands) implantation in patients with keratectasia, which appeared in the February 2011 issue of the Journa...