There is also a philosophy, pathologically classified, which denies the sun; this philosophy is called blindness.
按病理分类，也还有一种否认太阳的哲学，那种哲学叫做瞎眼论。
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Zhongshan Ophthalmic Center (ZOC) of Sun Yat-sen University is the first and leading advanced ophthalmic center in China, integrating eye care, teaching, eye research and blindness prevention.