患者，男性，19岁，双眼"近视"9年。曾戴角膜接触镜矫正，视力良好。最近2年发现近视度数加深较快。眼部检查：右眼0.2，戴镜矫正视力1.0；左眼0.1，矫正视力0.4。双眼均无充血，右眼角膜透明，角膜中央向前隆起，呈锥状，中央变薄。左眼角膜向前锥状突起、变薄更明显，中央部出现明显的全层角膜混浊。验光结果：右眼-5.75DS-3.75DC×170°→1．0左眼-6.50DS-5.65DC×150°→0.4。
患者左眼角膜中央部混浊，最可能的原因是（）
A.长期戴角膜接触镜引起的角膜创伤
B.圆锥角膜并发的先天性角膜混浊
C.急性圆锥角膜
D.急性圆锥角膜消退后残留的角膜混浊
E.大泡性角膜病变
参考答案：D
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