EyeWorld Asia-Pacific September 2014 Issue

53 EWAP rEfrActivE September 2014 LENSTAR LS 900 Improving outcomes. Olsen Formula on Board Measured lens thickness and the innovative concept of the C-constant of the on-board Olsen IOL calculation formula for premium IOL power prediction with the LENSTAR. T-Cone Toric Platform The optional T-Cone complements LENSTAR’s measurement pallet with true Placido-Topography of the central cornea and a powerful toric IOL planner EyeSuite IOL Toric Planner The optional IOL toric planner allows optimisation of the inci- sion location and planning of the surgery on real eye images to reach advanced refractive results. www.haag-streit.com See us at APACRS‘14 Booth #S24 ADV_Lenstar_EyeWorld_ Asia_Pacific_12-08-2014.indd 1 18.08.2014 14:39:50 not undergone previous surgery. “There may be surgeons who use this off label, but they should know there is no data in the U.S. clinical trials to support that,” he said. Pearls Dr. Cummings said that surgeons must make sure that patients are well informed about the technology. Tell patients you are trying to make the cornea more regular, which will lead to better vision once you have corrected with glasses, contacts, or another treatment option, he said. “I think you need to spend time going on a training course where you can learn more about how to predict what the refractive effect is going to be of the regularizing procedure,” Dr. Cummings said. He added a warning that “it’s a very powerful tool, and the laser’s going to do exactly what you ask it to do.” It’s important to know what it is going to do and be sure you have read the ablation profile, he said. The key pearl that Dr. Durrie offered is “if it’s a topography- driven treatment, surgeons need to make sure they have excellent topography.” Normally topography is used as a diagnostic screening tool, and now it is being used as a therapeutic tool. Make sure you have the right topography and that it is done properly, he said. compared to wavefront The main difference between wavefront and topography data is that wavefront is based on the optics just through the pupil, while topography data is based on the corneal surface. It may be hard to get good wavefront data for complicated patients because the corneal aberration is so high; it might be necessary to use topography-guided in these patients, Dr. Cummings said. The U.S. clinical trial did not look at any head-to-head comparisons of topography- guided ablations and wavefront. Because there have been trials on wavefront-optimized, wavefront- guided, and topography-guided, Dr. Durrie said there is data to be reviewed in the future on this topic. EWAP Editors’ note: Dr. Cummings has financial interests with Alcon (Fort Worth, Texas, U.S.). Dr. Durrie was an investigator in the topography- guided ablation U.S. clinical trial. contact information cummings: abc@wellingtoneyeclinic.com Durrie: ddurrie@durrievision.com