OCT 2013

EyeWorld is the official news magazine of the American Society of Cataract & Refractive Surgery.

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Page 115 of 134

October 2013 said. "All these devices apply current technology to an observation technique developed more than 200 years ago." The argument that curvature is more sensitive than elevation is "just not true," Dr. Belin argued. "Curvature does not imply shape." Alternatively, posterior analysis provides images of both the anterior and posterior cornea, is less suscepti- EW MEETING REPORTER 113 ble to false negatives and false positives and provides a full pachymetric map, Dr. Belin said. It also offers the greatest corneal coverage, he added. Experience with crosslinking Calling crosslinking one of the greatest advances in the last few years for the treatment of keratoconus, Gustavo Tamayo, MD, Bogota, Colombia, shared his years continued on page 114 BUBBLE LEVEL MARKER • Stephens Bubble Level Axis Marker helps align the marker with the horizontal axis "It should only be considered when medical therapy is not enough or not possible," he said. Pilocarpine usage should be considered, Dr. Vessani said. "Complications are rare," he said. Robert Ritch, MD, New York, shared a video of using contraction burns to treat plateau iris. "The main thing is you have to go peripherally," he advised. "If you go as peripherally as possible, you will not open the angle." Friday, Aug. 9 Keratoconus and other ectatic diseases were the topic of the first cornea symposium on Friday. Sergio Kwitko, MD, Brazil, gave the audience a list of main diseases associated with keratoconus, including atopy (27–66%), mitral valve prolapse (58%), sleep apnea (18– 19.6%), Down syndrome (.5–15%), and connective tissue disorders (16%) during his talk, "Update on pathogenesis and epidemiology of ectatic diseases." "This may help us understand the pathogenesis of this disease," he said. Post-LASIK keratectasia has many similarities to keratoconus, Dr. Kwitko said, including thinning of the corneal stroma, protrusion of the central cornea, epithelial hypoplasia and defects in Bowman's layer, among others. Genetics link the two as well. "A patient who has a mother or father with keratoconus is at higher risk for developing post-LASIK ectasia," Dr. Kwitko said. He also tells all of his patients "No (eye) rubbing!" as this can lead to the same complication. Evaluating and diagnosing keratoconus In his talk, Michael Belin, MD, compared anterior analysis vs. posterior analysis and concluded, "posterior analysis is superior to anterior analysis for the evaluation and diagnosis of keratoconus." While Dr. Belin said that anterior analysis does have a longer track record, he doesn't always think this is a positive. "It dates back to the 1800s, and Placido disc is what the anterior curvature topography is based on," he • Easily removable and replaceable lightweight bubble level • Designed and engineered to meet the needs of sterilization • Crisp edges create a fine demarcation • Length of marks accommodate both limbal and corneal markings • Marker is made of matte finished stainless steel • Replacement bubble level cylinders are available individually • Overall length is 120mm, with an 11mm wide blade and 2mm wide marking surfaces S9-2070 Bubble Level Axis Marker Visit Us at AAO Booth #3839 2500 Sandersville Rd., Lexington, KY 40511 USA Phone: 800-354-7848, 859-259-4924 Fax: 859-259-4926 E-Mail: stephensinst@aol.com www.stephensinst.com

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