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The Rebound Effect on Repeated Low-Level Red Light Therapy for Myopia

2026年8月2日 更新者:Lixia Feng、The First Affiliated Hospital of Anhui Medical University

The Rebound Effect on Repeated Low-Level Red Light Therapy for Myopia: A Randomized Controlled Clinical Trial

Myopia is a global public health issue, projected to affect 49.8% of the world population by 2050, increasing risks of cataracts, glaucoma, macular degeneration, and retinal detachment. Repeated low-level red light (RLRL) therapy has shown promising myopia control in 12-month trials, reducing axial elongation by 69.4% and refractive progression by 76.6% versus spectacles, outperforming 0.01% atropine and benefiting orthokeratology poor responders. However, two-year data indicate declining efficacy in the second year and a rebound effect upon discontinuation, with progression rates matching untreated controls. This study enrolls participants who completed one year of continuous RLRL therapy to evaluate rebound effects on axial length and spherical equivalent refractive power among those who discontinue, gradually reduce, or continue treatment. Findings will inform strategies to optimize long-term RLRL protocols and mitigate post-treatment rebound.

調査の概要

状態

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条件

介入・治療

詳細な説明

Myopia is a public health issue of global concern, with its incidence and severity increasing annually, particularly among children and adolescents. Projections indicate that by 2050, the global prevalence of myopia will reach as high as 49.8%, with the prevalence of high myopia reaching 9.8% .With the rising prevalence of myopia, the risk of myopia-related complications has increased significantly, including cataracts, glaucoma, myopic macular degeneration, and retinal detachment. Without proper management, these conditions can lead to severe visual impairment and substantial societal burdens. Therefore, preventing and slowing the onset and progression of myopia has become a critical strategy in myopia control efforts.

Repeated low-level red light (RLRL) therapy is an emerging treatment modality for myopia control. In a 12-month multicenter randomized clinical trial, the RLRL group demonstrated a 69.4% reduction in axial length elongation and a 76.6% decrease in myopic refractive progression compared to the single-vision spectacle (SVS) group. Furthermore, RLRL therapy showed superior efficacy in patients with high myopia, achieving an axial length reduction of over 0.05 mm in 53.3%-59% of cases.Comparative studies on the efficacy of atropine in controlling myopia demonstrated that, after 12 months of use, the RLRL therapy significantly outperformed 0.01% atropine in controlling axial length.In myopic patients who still exhibit poor control of axial length despite wearing orthokeratology lenses, combined use of RLRL therapy significantly inhibits axial growth.

Given that myopia typically progresses continuously during childhood, Xiong et al. investigated the long-term efficacy and safety of RLRL therapy over a period exceeding two years. The results demonstrated good tolerability of RLRL therapy, with an efficacy rate of 75% in terms of axial length reduction and myopic refractive control after two years of treatment; however, the therapeutic efficacy declined in the second year compared to the first year.Additionally, similar to other myopia intervention strategies, a rebound effect was observed in patients who discontinued RLRL treatment after one year; in these patients, their myopia progression rate during the second year was comparable to the progression level observed in the SVS group during its first year.

To further investigate the long-term efficacy of RLRL treatment and rebound effects after treatment discontinuation, as well as to explore strategies for mitigating these rebound effects, this study focused on participants who received continuous RLRL therapy for one year. It examined the rebound effects in axial length (AL) and spherical equivalent refractive power (SER) among participants who discontinued or gradually reduced RLRL treatment compared to those who continued treatment.

研究の種類

介入

入学 (推定)

159

段階

  • 適用できない

連絡先と場所

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研究連絡先

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 子

健康ボランティアの受け入れ

いいえ

説明

Inclusion Criteria:

  1. 8 to 16 years old
  2. Rceived continuous RLRL treatment for 1 year (±1 month) without interruption.
  3. Diagnosed with myopia (ciliary muscle paralysis SER ≥ -0.50 D), astigmatism ≤ 2.50 D, anisometropia ≤ 1.50 D, and bilateral best corrected visual acuity (BCVA) ≥ Snellen 20/20 before receiving RLRL treatment.
  4. The consent of the guardian and the consent of the participant.

Exclusion Criteria:

  1. History of any ophthalmic surgery or ocular diseases (e.g., glaucoma, retinal disorders).
  2. Systemic diseases that affect vision or eye health (e.g., diabetes). After discontinuing RLRL treatment, other myopia control interventions other than monocular glasses should be employed (including atropine, orthokeratology lenses, defocused/DOT lenses, etc.).

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか?

デザインの詳細

  • 主な目的:処理
  • 割り当て:ランダム化
  • 介入モデル:並列代入
  • マスキング:独身

武器と介入

参加者グループ / アーム
介入・治療
アクティブコンパレータ:the continued RLRL treatment group(RLRL-C)
The pediatric participants had received continuous Repeated low-level red light(RLRL) treatment for one year and continue to receive RLRL treatment for one more year.
Repeated low-level red light (RLRL) therapy is an emerging treatment modality for myopia control. The participants were randomly assigned to three groups: the continued RLRL treatment group (RLRL-C), the discontinued RLRL treatment group (RLRL-I), and the gradually reduced RLRL treatment group (RLRL-T).
実験的:the discontinued RLRL treatment group (RLRL-I)
The pediatric participants had received continuous Repeated low-level red light(RLRL) treatment for one year and discontinue RLRL treatment for one year.
Repeated low-level red light (RLRL) therapy is an emerging treatment modality for myopia control. The participants were randomly assigned to three groups: the continued RLRL treatment group (RLRL-C), the discontinued RLRL treatment group (RLRL-I), and the gradually reduced RLRL treatment group (RLRL-T).
実験的:the gradually reduced RLRL treatment group (RLRL-T)
The pediatric participants had received continuous Repeated low-level red light(RLRL) treatment for one year and gradually reduce the RLRL treatment for one year(First month: twice daily, for 5 days per week;Second month: Once daily, for 5 days per week;Third month: once daily, for 3 days per week).
Repeated low-level red light (RLRL) therapy is an emerging treatment modality for myopia control. The participants were randomly assigned to three groups: the continued RLRL treatment group (RLRL-C), the discontinued RLRL treatment group (RLRL-I), and the gradually reduced RLRL treatment group (RLRL-T).

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
Axial length(AL)
時間枠:Baseline, 6 months and12 months.
Change from baseline in Axial length [Unit of Measure:mm]
Baseline, 6 months and12 months.

二次結果の測定

結果測定
メジャーの説明
時間枠
Change in Spherical Equivalent Refraction (SER)
時間枠:Baseline, 6 Months, 12 Months
Mean change from baseline in spherical equivalent refraction [ Unit of Measure: Diopters (D) ]
Baseline, 6 Months, 12 Months
Best-Corrected Visual Acuity (BCVA)
時間枠:Baseline, 6 Months, 12 Months
Change from baseline in best-corrected visual acuity measured using the ETDRS chart [Unit of Measure: LogMAR]
Baseline, 6 Months, 12 Months
corneal curvature
時間枠:Baseline, 6 Months, 12 Months
Change from baseline in mean corneal curvature (K-readings) [Unit of Measure: Diopters]
Baseline, 6 Months, 12 Months
Anterior Chamber Depth (ACD)
時間枠:Baseline,6 months and 12 months.
Change from baseline in anterior chamber depth (Unit of Measure:mm)
Baseline,6 months and 12 months.

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研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (推定)

2026年8月15日

一次修了 (推定)

2027年12月31日

研究の完了 (推定)

2028年7月15日

試験登録日

最初に提出

2026年7月28日

QC基準を満たした最初の提出物

2026年8月2日

最初の投稿 (実際)

2026年8月5日

学習記録の更新

投稿された最後の更新 (実際)

2026年8月5日

QC基準を満たした最後の更新が送信されました

2026年8月2日

最終確認日

2026年7月1日

詳しくは

本研究に関する用語

追加の関連 MeSH 用語

その他の研究ID番号

  • KY2026-03-88

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