Interventions and visits
SFChT, diopter
CYCLOPLEGIA, ACD
All spectacle lenses were made for single focus with full correction for each subject as the first intervention throughout the whole procedure for both groups. PBM therapy was performed with a low-intensity laser (LD-A, Jilin Londa Optoelectronics Technology, Jilin, China) with an irradiance of 0.35 ± 0.02 mW/cmDuring the baseline visit, eligibility was evaluated, and baseline measures were conducted. The dates of all subsequent visits were determined based on completion of the baseline examinations. Cycloplegic refraction using an automatic refractometer (Topcon KR-800, Topcon Corporation, Tokyo, Japan) and 100% subjective trial lenses were recorded at baseline and 12 months, respectively. Cycloplegia was achieved using 3 drops of 1% cyclopentolate hydrochloride eyedrop (CYCLOGYL, Alcon Laboratories, Inc., USA), and the spherical equivalent refraction (SER) was determined (obtained with the following formula: SER = spherical diopter + astigmatism/2). The follow-ups were conducted at 3 months, 6 months, 9 months and 12 months. The values of AL (IOLMaster 500, Carl Zeiss Meditec AG, Germany), CCP (Pentacam 70700, Oculus, Inc., Germany), SFChT (Spectralis OCT, Heidelberg Engineering GmbH, Germany) and ACD (Pentacam 70700, Oculus, Inc., Germany) were all recorded and evaluated at each visit in addition to the baseline visit.Other ophthalmologic examinations included slit-lamp examination (HS-5000(HLG), Huvitz Co. Ltd, Korea), noncontact tonometry (Topcon CT-80, Topcon Inc., Japan), and fundus scan with optical coherent tomography (Spectralis OCT, Heidelberg Engineering GmbH, Germany).