EyeWorld India September 2023 Issue

In one study, Dr. Srivannaboon subjectively evaluated night vision in large pupil patients (pupil size of 7 mm to 8.5 mm) from two different groups: patients who underwent ReLEx SMILE and patients who underwent femtoLASIK. Dr. Srivannaboon found that with lenticule extraction, very few patients reported worse night vision than before they underwent surgery. “Because of this, we are shifting more patients to lenticule extraction,” he said. “If you look at my practice starting in 2011 until April this year, we have more and more cases of lenticule extraction. I’m doing less femtoLASIK procedures. 96% of my cases are now lenticule extraction.” Recently, Dr. Srivannaboon received the new VISUMAX® 800, and, although he has limited experience with the device since he started to use it in May of this year, he has noticed a few improvements to the VISUMAX® 800 compared with the old VisuMax 500. The new VISUMAX® 800 device delivers a higher laser frequency, thus decreasing the time to cut the lenticule during surgery. Dr. Srivannaboon found it 11 seconds faster to perform lenticule cutting with the VISUMAX® 800 than the VisuMax 500. “This matters because of the patient’s eye movement during the lenticule cutting,” he said. Some patients are difficult or find the procedure uncomfortable, and a faster speed allows for the laser to be completed before the patient squeezes his or her eye. Dr. Srivannaboon offered a few other benefits to the new device. The open sky ergonomics of the VISUMAX® 800 provides more space to the patient, thus allowing more comfort with this design. Rather than being an MRI-like tunnel machine that the VisuMax 500 is, Media placement sponsored by Carl Zeiss Meditec AG Not all products, services or offers are approved or offered in every market and approved labeling and instructions may vary from one country to another. The statements of the authors of this supplement reflect only their personal opinion and experience and do not necessarily reflect the opinion of Carl Zeiss Meditec AG or any institution with whom they are affiliated. Carl Zeiss Meditec AG has not necessarily access to clinical data backing the statements of the authors. The statements made by the authors may not yet been scientifically proven and may have to be proven and/or clarified in further clinical studies. Some information presented in this supplement may only be about the current state of clinical research and may not be part of the official product labeling and approved indications of the product. The authors alone are responsible for the content of this supplement and any potential resulting infringements resulting from, in particular, but not alone, copyright, trademark or other intellectual property right infringements as well as unfair competition claims. Carl Zeiss Meditec AG does not accept any responsibility or liability of its content. potentially causing patients to feel claustrophobic, the new VISUMAX® 800 has an arm that moves up and down, allowing patients to feel less restricted. The centration guide on the VISUMAX® 800 also provides an upgraded experience to surgery as the surgeon now has lines and dots for guidance. With the old device, centration had to be done on its own. Dr. Srivannaboon overall found positive results from performing SMILE Pro with the VISUMAX® 800. “The refractive outcomes were good because the integrated technology helped me perform surgery more easily,” he said. Comparing ReLEx vs FemtoLASIK: the left image shows the corneal topography of lenticule extraction, and the right image shows corneal topography of excimer laser ablation. The optics of the cornea is much better with lenticule extraction than excimer laser ablation. “The refractive outcomes were good [with the VISUMAX® 800] because the integrated technology helped me perform surgery more easily.” Sabong SRIVANNABOON, MD

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