EyeWorld China September 2019 Issue

Alcon Wavelight ® USER MEETING HIGHLIGHTS 16-17 March 2019 HONG KONG The Alcon Wavelight ® User Meeting was held on March 16 and 17, 2019 in Hong Kong. Experts and key opinion leaders in refractive surgery across the Asia-Pacific regions came together to share their experience and align with the latest developments in refractive surgery. The objectives of the meeting were to provide a forum to exchange best practices and technical experiences in topography-guided treatments, femtosecond laser and Contoura TM Vision. Keeping pace with innovation, upcoming new technologies such as Streamlight TM and ray tracing were discussed. FROM TOPOGRAPHY-GUIDED TREATMENT TO CONTOURA TM VISION The Need for Topography-Guided Treatments Prof. Zhang Fengju Topography-guided treatment is designed to regularize the cornea. Indications for topography- guided treatment include irregular corneas, corneal scars, keratoconus, treatment of complications of previous refractive surgery such as decentered ablations, small optical zones, and irregular astigmatism. Conventional refractive surgeries have several limitations with a considerable proportion of patients experiencing visual symptoms such as night glare, halo, and decreased night vision, impacting night driving and working. 1 Higher order aberrations resulting from pre-operative corneal irregularities, increased coma due to decentered ablations and increased post-operative spherical aberrations (from small optical zones), are some of the common factors responsible for poor quality vision after conventional refractive surgeries. Prof. Zhang Fengju, a leading expert in refractive surgery, explained that with technological advances, twomaincustomizedsolutions,wavefront- guided and corneal topography-guided treatments, are now available. Wavefront-guided ablations use static measurements of the eye. However, human wavefront aberrations are dynamic and constantly changing with accommodation, while topography- guided treatments use information from corneal topography and do not change with accommodation.