A Randomized Controlled Trial of LED Red Light in Modulating Choroidal Microcirculation to Retard Retinal Atrophy in Pathological Myopia
The goal of this clinical trial is to learn if LED repeated low-level red light (RLRL) therapy works to treat pathologic myopia in adults. It will also learn about the safety of LED-RLRL. The main questions it aims to answer are: Does LED-RLRL modulate choroidal microcirculation to retard retinal atrophy in pathological myopia? What medical problems do participants have when receiving LED-RLRL therapy? Researchers will compare with a sham device (identical in appearance but delivering \<10% of the original device's energy output) to see if LED-RLRL works to treat pathologic myopia. Participants will: Take LED-RLRL or sham LED-RLRL twice daily, 3 minutes per session, 5 days per week, for a total duration of 12 months. Visit the clinic once every 3 months for checkups and tests. Keep a diary of their symptoms and their visual perception.
• Age range: 18 to 55 years old;
• Baseline visual acuity: Best Corrected Visual Acuity (BCVA) ≥ 0.1 (LogMAR ≤ 1.0);
• Meeting the diagnostic criteria for high myopia: Spherical Equivalent (SE) ≤ -6.00 D and Axial Length (AL) ≥ 26.0 mm;
• Meeting one of the following pathological fundus changes:
• (i) Fundus manifestations corresponding to Category 2 (diffuse chorioretinal atrophy), Category 3 (patchy chorioretinal atrophy), or Category 4 (macular atrophy associated with choroidal neovascularization) of the META-PM classification criteria\*; (ii) Category 1 of the META-PM classification criteria\* complicated with macular schisis; (iii) BCVA \< 0.6;