男性,72岁。査体见角膜边缘及周围出现 灰白色混浊环。是由于下列哪个原因 所致

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31863' and id < 2547327 and id<>'2547327' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31863' and id > 2547327 and id<>'2547327' order by id asc limit 5