On January 15, 2026, the 6th MRT Grand Lecture · Peripheral Refraction Measurement Technology Seminar was held as scheduled. The event featured a special guest speaker, Dr. Xuechuan Dong, who addressed key pain points in clinical dispensing practice. Through in-depth analysis, he uncovered the truth behind so-called “pseudo myopia progression,” delivering a solid and insightful presentation on standardized refraction procedures and precision-based myopia control.

1. Evidence-Based: The Clinical Foundation of Customized Defocus

At the start of the seminar, Dr. Xuechuan Dong first reviewed the clinical data of the I.O.R.C. customized defocus spectacles—showing that the two-year myopia control effect was maintained at 72%. Real-world data once again confirmed that, under precise fitting and scientific guidance, customized defocus technology can effectively slow axial elongation. However, the key logic behind these results lies in “precision fitting.” Excellent product design must be implemented through strict and standardized clinical fitting procedures in order to translate into tangible myopia control outcomes for children.

2. Key Insight: Beware of “Undercorrection” Causing “False” Myopia Progression

This was one of the most thought-provoking segments of the seminar. Clinically, it is often observed that some children continue to experience rapid refractive progression even after wearing corrective lenses. Does this mean the myopia control has failed? Dr. Xuechuan Dong emphasized that “undercorrection” is a major enemy in myopia control, often creating the illusion of accelerated progression. A common misconception: prescribing lenses directly after cycloplegia. In many fitting scenarios, prescriptions are issued immediately after cycloplegic refraction. Dr. Dong stressed that this is a frequent cause of undercorrection, because the accommodative system is paralyzed under cycloplegia, and lenses prescribed at this stage may be insufficient once the eye recovers.

Golden Rule: MPMVA + Post-Cycloplegia Small-Pupil Re-Examination

To avoid interference from “pseudo-myopia” while ensuring full correction, clinical practice must strictly follow the MPMVA principle (minimum prescription achieving maximum corrected visual acuity) and perform a small-pupil re-examination after cycloplegia. Only by providing adequate correction can retinal image quality be ensured, thereby allowing the defocus effect of micro-lenses to effectively contribute to myopia control.

3. Practical SOP: From MRT Imaging to Frame Selection

Optical fitting is not merely about prescribing a refractive power; it is a systematic process. The seminar provided a detailed breakdown of every operational detail that can affect myopia control outcomes. Regarding MRT imaging, only precise peripheral refraction topography data can enable truly customized lenses. 

As for frame selection, the size and stability of the frame directly determine whether the optical zones of the micro-lenses remain properly aligned with the pupil over time. 

Daily Wear Guidance: Daily habits—including wearing duration, posture, and outdoor activities—all play a role in effective myopia control.

4. Breakthroughs in Challenges: Fitting Solutions for Special Populations

In complex clinical cases, standard protocols are often insufficient. This seminar specifically addressed the fitting challenges for special populations, providing concrete strategies. For combined therapy patients, such as children currently using orthokeratology lenses or low-dose atropine, guidance was given on how customized defocus spectacles can be used as a supplement or alternative. 

Can customized defocus spectacles be prescribed for patients with strabismus? Our standard is as follows: if, after half an hour of occlusion, the deviation changes by more than 30 prism diopters, surgical intervention is recommended before fitting defocus spectacles. 

For individuals with visual function abnormalities, Dr. Dong emphasized that poor visual function may affect the efficacy of the lenses, but it does not produce adverse effects. Simultaneous visual function training is recommended.

The seminar resonated deeply with the attending experts, particularly during discussions on standardized cycloplegic refraction and the implementation of the MPMVA principle, with many participants reporting significant insights and benefits. 

Meeting recording link: https://meeting.tencent.com/crm/2axDbDReab