Study Comparing Eye Growth Over Time in Children Using Two Myopia Control Lenses

The goal of this clinical trial is to investigate the short-term changes in the eye structure while wearing two types of lenslet-based myopia control lenses over a period of 6 months in children aged 6 to 13 years with myopia. The main question it aims to answer is: * How the eye responds, at each timepoint, to the two myopia control lenses by evaluating: 1. Change in axial length 2. Change in choroidal thickness Participants will: * Wear the study spectacles * Visit Essilor R\&D Centre for follow-up sessions