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Anti-fibrosis efficiency of the co-delivery complexes. Rabbits were sacrificed 15 days after filtering surgery, eye tissues were collected, fixed, dehydrated, and embedded in paraffin. Tissues were cut into 3–4 μm sections for hematoxylin–eosine staining. (A) Fibrosis tissues (circled with black dot lines) in filtering areas and (B) tissue toxicity in corneas was observed under microscope. Scale bar, 200 μm.
