土曜セッションで”Cutting edge of myopia treatment”があり、その掉尾がオーストラリアメルボルン大学のMingguang He先生による”Repeated Low-level red-light therapy for myopia control in children”でした。 即ち、赤色光で近視治療であり、最後に持ってきたてことはこの治療が注目されてるということかしらん?
Participants: Two hundred sixty-four eligible children 8 to 13 years of age with myopia of cycloplegic spherical equivalent refraction (SER) of -1.00 to -5.00 diopters (D), astigmatism of 2.50 D or less, anisometropia of 1.50 D or less, and best-corrected visual acuity (BCVA) of 0.0 logarithm of the minimum angle of resolution or more were enrolled in July and August 2019. Follow-up was completed in September 2020. Methods: Children were assigned randomly to the intervention group (RLRL treatment plus single-vision spectacle [SVS]) and the control group (SVS). The RLRL treatment was provided by a desktop light therapy device that emits red light of 650-nm wavelength at an illuminance level of approximately 1600 lux and a power of 0.29 mW for a 4-mm pupil (class I classification) and was administered at home under supervision of parents for 3 minutes per session, twice daily with a minimum interval of 4 hours, 5 days per week.
8歳〜13歳の近視264例で 「眼鏡装用+週5回1日2回3分ずつ赤色光を見る」 vs 「眼鏡装用のみ」 を比較した。
その結果、
Results: Among 264 randomized participants, 246 children (93.2%) were included in the analysis (117 in the RLRL group and 129 in the SVS group). Adjusted 12-month axial elongation and SER progression were 0.13 mm (95% confidence interval [CI], 0.09-0.17mm) and -0.20 D (95% CI, -0.29 to -0.11D) for RLRL treatment and 0.38 mm (95% CI, 0.34-0.42 mm) and -0.79 D (95% CI, -0.88 to -0.69 D) for SVS treatment. The differences in axial elongation and SER progression were 0.26 mm (95% CI, 0.20-0.31 mm) and -0.59D (95% CI, -0.72 to -0.46 D) between the RLRL and SVS groups. No severe adverse events (sudden vision loss ≥2 lines or scotoma), functional visual loss indicated by BCVA, or structural damage seen on OCT scans were observed.
Conclusions: Repeated low-level red-light therapy is a promising alternative treatment for myopia control in children with good user acceptability and no documented functional or structural damage.
1年後
「眼鏡装用+週5回1日2回3分ずつ赤色光を見る」は眼軸長0.13mm伸長 vs 「眼鏡装用のみ」は、眼軸長0.38mm伸長
「眼鏡装用+週5回1日2回3分ずつ赤色光を見る」は-0.20D進行 vs 「眼鏡装用のみ」は、-0.79D進行
This alternative hypothesis, that high retinal contrast signals the eye to grow, predicted that reducing contrast will slow axial growth and prevent myopia progression. A pilot study to test this hypothesis was performed in children with rapidly progressing myopia. The children wore spectacles made to their prescription in which one lens was a standard of care corrective lens, while the contralateral lens incorporated optical elements that modestly reduced contrast. Remarkably, over the three-month trial period, axial growth was drastically reduced in the treated eyes compared to controls. When the lenses were then switched between eyes (i.e., contralateral crossover), the formerly treated eye resumed its growth, and former control eyes virtually stopped growing.