Efficacy Analysis of Anti-VEGF Drugs Combined With Micropulse Laser in the Treatment of Diabetic Macular Edema

The goal of this clinical trial is to clarify the efficacy of anti-vascular endothelial growth factor (anti-VEGF) drugs combined with subthreshold micropulse laser (SML) therapy on retinal function and anatomical recovery in patients with diabetic macular edema (DME). The main questions it aims to answer are: * To clarify the efficacy of anti-VEGF drugs combined with SML therapy on retinal function and anatomical recovery in DME patients. * To explore the changes in visual acuity and optical coherence tomography angiography (OCTA) parameters before and after the treatment of DME with anti-VEGF drugs combined with SML, and further explore the changes in morphological characteristics of retinal microvessels and the potential treatment mechanism. Participants will randomly be given Intravitreous injection of anti-VEGF drugs or anti-VEGF drugs combined with SML therapy. All participants will be followed up for 6 months after treatment.