EyeWorld China September 2019 Issue

Clinical Outcomes of ContouraTM Vision vs. Amaris 750S Dr. Pierce Lin Pi Jung Clinical Evaluation of Contoura TM Vision outcomes Dr. Sharif Hashmani Prof Bai Ji Ophthalmological Hospital, Chongqing, China Dr. Pierce Lin Pi Jung Chief Surgeon, Laser Refractive Surgery at Universal Eye Center Taiwan Dr. Sharif Hashmani Chairman Hasmanis Hospital, Pakistan Pakistan. Dr. Alnette Lee Tan Refractive surgeon American Eye Center, Philippines 4 Figure 1: Contoura TM demonstrated higher accuracy when compared to SCHWIND Amaris 750S, as observed in Dr Lin’s clinics Dr. Sharif Hashmani provided an overview of the clinical outcomes with Contoura TM vision highlighting improvement in uncorrected visual acuity (UCVA) and uncorrected distance visual acuity (UCDVA), predictable refractive outcomes and reduced visual symptoms; safety, efficacy and patient satisfaction. Contoura TM FDA pivotal study results were presented. Role of Topography Modified Refraction (TMR) in treating astigmatism was also discussed. Dr. Sharif touched upon the concept of phorcides, a new software based on vector analysis, which considers magnitude and axis of topographic and refractive astigmatism and ocular residual astigmatism (ORA) to predict the optimal axis to treat. Topography-modified refraction (TMR) is a relatively new concept that involves adjustment of the clinical refraction based on topographic data. Dr. Pierce Lin Pi Jung shared his personal clinical experience with Contoura TM Vision and SCHWIND Amaris 750S. Based on his experience with 144 patients (286 eyes), Dr Lin compared the predictability, accuracy, efficacy and safety of SCHWIND Amaris 750S (aberration free) versus EX500: WFO, Custom Q, Contoura TM (applying manifest refraction). While SCHWIND Amaris 750S and EX500 (WFO and Custom Q) showed good predictability of spherical equivalent, cylinder distribution and accuracy, Contoura TM was associated with better post-operative UDVA and safety. Another important consideration is TMR, where the amount and axis of astigmatism treated is based on topographic data. In a separate investigation, Dr. Lin explained that the definition of manifest refraction of Contoura TM was changed according to the axis difference; which was limited to manifest vs. measured axis ≤ 200. The observations showed that predictability of spherical 1-month post-operatively was almost similar in both Amaris 750S and Contoura TM , but Contoura TM seemed to be little better. Inmore than 80%of cases, accuracy of Contoura TM was observed to be within 0.5D, and the UDVC (41.07%) and safety (37.5%) was thought to be superior with Contoura TM compared to SCHWIND Amaris 750S (8.82%) (Figure 1).