Single intrastromal corneal ring segment best for peripheral cones,results show

June 1, 2006

San Francisco-Inferior placement of a single intrastromalcorneal ring segment (Intacs, Addition Technology) appears toafford better outcomes than double-segment placement when treatingkeratoconus and ectasia in eyes with peripheral (paracentral)cones, said Colin C.K. Chan, MD, at the annual meeting of theAmerican Society of Cataract and Refractive Surgery.

Dr. Chan presented the results from a retrospective, single-surgeon study comparing the two techniques in eyes with keratoconus or post-LASIK ectasia with inferior cones. It included 20 eyes of 17 patients that underwent double-segment placement and 17 eyes of 11 patients that had a single segment placed. All of the surgeries were performed by Brian S. Boxer Wachler, MD, director, Boxer Wachler Vision Institute, Beverly Hills, CA, using the steep axis of manifest refraction for the axis of incision.

Dr. Chan was previously a fellow at the Boxer Wachler Institute. He is now a refractive and corneal surgeon at the Eye Institute, Sydney, Australia.