TGFB1 and myopia: In contrast, the rat models for myopia without treatment (positive control, n = 5) and the rat models for myopia with citicoline dosages of 100 mg/BW/day (n = 5) and 200 mg/kg BW/day (n = 5) lack TGF-β1-positive stains in the anterior and posterior sclera (Figure 5B–D).