[請問] 一直在眼睛前面漂移的黑色雜線是什麼？
每當我在看天空、牆壁等素色物體時
眼睛前面都會有一些黑色雜線漂移
看起來像下面的線條：
http://i.redwh.al/hb.jpg
有些很清楚很明顯
有些卻很模糊
請問這是什麼？
一般人看東西時會有這些線條嗎？
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