We evaluated several ViT variants, including ViT-S16, ViT-S32, ViT-B16, and ViT-B32, to explore the impact of patch size (16x16 vs. 32x32) and model scale (Small vs. Base) on diabetic retinopathy (DR) grading, as shown in Table 6. This evidence concerns the gene VIT and diabetic retinopathy.