In "Ganka Kinno," an anatomical drawing of eyeball and the names of each part such as cornea, crystalline humor, membrane of crystalline and optic nerve were seen and we can understand that he had the necessary knowledge of modern medicine (operation of eyeball) (in "Zoku Ganka Kinno," operation of eyeball was described).
『眼科錦囊』には、眼球の解剖図が載っており、角膜や水晶液、水晶膜、視神経などなど各部位の名が見られ、近代医術（眼球の手術）に必要な知識が備わっていた事が分かる（『続眼科錦囊』には眼球の手術の様子が描かれている）。