PURPOSE To evaluate the safety and efficacy of modified intracorneal ring segment implantation (INTACS) in the management of moderate and advanced keratoconus (KCN). METHODS A modified procedure of intracorneal ring segment (INTACS) implantation was performed in eyes with moderate to advanced keratoconus that were intolerant to contact lens or spectacle correction. The main outcome measures w...

Unusual Secondary Displacement of Intacs Segments—Superimposition of Distal Ends We report a case of unusual secondary displacement of intrastromal corneal ring segments (Intacs; Addition Technology, Des Plaines, Illinois) away from the incision to the extent that the inferior ends overlapped in the tunnel. A 57-year-old man presented with unilateral keratoconus in the left eye with recent cont...

PURPOSE To psychophysically measure spherical and irregular aberrations in patients with various types of myopia correction. SETTING Laboratory of Experimental Ophthalmology, University of Groningen, Groningen, The Netherlands. METHODS Three groups of patients with low myopia correction (spectacles, soft contact lens, and Intacs) and 4 groups with high myopia correction (spectacles, rigid c...

In the past, the main goal of intrastromal corneal ring segment (ICRS) implantation was to reduce keratometry. Current treatment nomograms based on classifi cation of the ectasia phenotype aim to provide both therapeutic and refractive correction. We present the case of a 39-year-old woman diagnosed in 2011 with keratoconus in both eyes, with low best spectacle-corrected distance visual acuity ...

The objective of the present study was to compare single segment and double segment INTACS rings in the treatment of post-LASIK ectasia. In this interventional study, 26 eyes with post-LASIK ectasia were assessed. Ectasia was defined as progressive myopia regardless of astigmatism, along with topographic evidence of inferior steepening of the cornea after LASIK. We excluded those with a history...

PURPOSE To evaluate and compare visual, refractive, and corneal aberrometric outcomes after implantation of 2 types of intrastromal corneal ring segments (ICRS) in eyes with early to moderate ectatic disease. SETTINGS Vissum Corporation-Instituto Oftalmológico de Alicante, Alicante, Spain. METHODS This retrospective analysis comprised consecutive eyes with grade I or grade II corneal ectasi...