On the afternoon of April 11th, at COOC 2024 venue, optometry experts from all over the country gathered at the " One Person, One Horizon | Thondar Defocus customization & MRT Academic Seminar "and" Peking University Boya Beijing, Tianjin-Hebei Optometry Forum ", to share the latest clinical research results of Multispectral Refraction Topography (MRT) and Thondar Defocused Customized Myopia Spectacle Lens in the process of myopia prevention and control.

Professor Qu Jia, the general president of the Eye Hospital, WMU, and Professor Zhou Xingtao, the president of the EYE&ENT Hospital of Fudan University, served as the chairmen of the conference. Professor Liu Longqian, Director of Ophthalmology from West China Hospital of Sichuan University, Professor Liu Chunmin from Huaxia Eye Hospital Group, Professor Yang Yingying from Hunan Children's Hospital, Director Zhang Xiaoxiao from Guangzhou Aier Eye Hospital, and Dr. Dong Xuechuan from Thondar do the theme sharing.

Professor Qu Jia stressed in his speech at the conference that the prevention and control of myopia needs prediction, prevention, and early warning, as well as good methods and technical intervention, to complete the national prevention and control task of myopia. Thondar's Multispectral Refraction Topography (MRT) and defocus customization technology are innovative, effective, and safe, and they should continue to develop and move forward. The prevention and control of myopia is about persistence and innovation. It is expected that Thondar's innovation will bring more news and hope to the prevention and control of myopia around the world.

Professor Liu Longqian from West China Hospital of Sichuan University: Long-term clinical data of Thondar Defocused Customized Myopia Spectacle Lens 

Professor Liu Longqian shared the long-term clinical data of Thondar Defocused Customized Myopia Spectacle Lens-ZiXia. Data from the randomized, double-blind, and parallel-controlled study showed that, compared with the single focus lens, the control efficiency of the equivalent spherical lens was 77% and the control efficiency of axial growth was 74% after 12 months of wearing of Thondar Defocused Customized Myopia Spectacle Lens-ZiXia. All subjects adapted to the lens within 7 days without adverse events or complaints of discomfort with lens wearing.

In the second stage of the clinical study, the control group of the first stage was changed to wearing Thondar Defocused Customized Myopia Spectacle Lens-ZiXia. In the 12-18 months, the SER change was 0.02D, and the eye axis growth was 0.03mm, which increased the effect of myopia delay significantly. The experimental group was not less effective in controlling myopia in the second stage.

Professor Liu Chunmin  from Huaxia Eye Hospital Group: The application of Thondar defocus customization technology in myopia control

Professor Liu Chunmin analyzed the problem of why to select a peripheral defocus lens and what a defocus lens is in clinical work. Multispectral Refraction Topography can intuitively show the development trend of children's myopia, provide data basis, and facilitate communication between doctors and patients, which is also the significance of technological development.

Professor Yang Yingying from Hunan Children's Hospital: The clinical assessment of myopia control with Thondar Defocused Customized Myopia Spectacle Lens

There is no significant difference in the myopia prevention and control effect between Thondar Defocused Customized Myopia Spectacle Lens and OK glasses, personalized defocus glasses for low age and low degree show a more friendly myopia control effect, for 7~10 early children with myopia provide a better choice of myopia prevention and control options.

Director Zhang Xiaoxiao from Guangzhou Aier Eye Hospital: One person, one lens, precise prevention and control

She recommended personalized defocus design based on MRT, to improve the effectiveness of myopia control as far as possible, standardize the inspection and distribution process, and improve the medical attributes of functional lenses.

Dr. Dong Xuechuan from Thondar Company: Thondar Defocus Customization Technology past, present, and future

Thondar’s R & D team and ophthalmology experts strive to optimize the surface design, make a breakthrough in the art, integrate a variety of myopia control technologies, and expand the application of new fields.

Finally, Professor Zhou Xingtao made a summary of the meeting: Thanks to Professor Qu Jia, all the experts, and Thondar for their in-depth thinking and hard work on the prevention and control of myopia. Based on the long-term and rich clinical research done by Professor Liu Longqian, the research summary of the customized lens supported by a rigorous academic attitude and rigorous data, and the clinical practice of the experts, we look forward to clinical research in more areas. Defocus customization, the future has come, We jointly promote optical intervention and lifestyle habits, so that children have a broader world and stay away from myopia.

On April 13, "Peking University Boya Beijing-Tianjin-Hebei Optometry Forum" on the new application of Multispectral Refraction Topography research is also full of the wisdom of explorers.

Professor Zhang Yu from Peking University Third Hospital: Myopia Control of Orthokeratology Lens and Multispectral Refraction Topography(MRT)

Shen conducted a study on 51 patients who wore orthokeratology lenses for more than one year and found that the wide-angle shooting mode of MRT can fully display the state of peripheral retinal detachment after orthokeratology. The position of the focal ring of retinal myopia generated after orthokeratology is closer to the macula. The larger the defocus width is, the larger the defocus amount is, and the slower the growth of the eye axis is. This study also explains the reasons for the better myopia prevention and control effect after low light area orthokeratology lens, wide reversal arc, increased defocus design, and Angle plastic eccentricity.

Director Zhang Jing from Beijing Mingshiguang Eye Hospital: Orthokeratology lens fitting and defocus with the peripheral retina

Through research, it is concluded that: The Multispectral Refraction Topography (MRT) can assist in evaluating the patient control effect of wearing OK-lens in the early stage, reminding clinicians to change strategies and adjust lens parameters as soon as possible. Meanwhile, combining the results of defocusing detection of MRT, digital lens defocusing design can be carried out, and the defocusing amount of OK-lens can be personalized and customized to help clinicians develop personalized defocusing adjustment plans. This research is in progress. Expect to achieve a better myopia delay effect.

（From 眼视光观察公众号）