OK镜对于青少年视力矫正真的OK吗?

视博士护眼知识小讲堂第三期开讲啦,本期关注的话题是,市面上流行的OK镜对于青少年矫正视力,是否真的有用?

首先我们先来说说OK镜到底是什么。OK镜(Othokeratology lens)是采用了一种特殊逆几何形态设计的角膜塑形镜片,其内表面由多个弧段组成。镜片与泪液层分布不均,由此产生的流体力学效应改变角膜几何形态,逐步使角膜弯曲度变平、眼轴缩短,从而有效地阻止了近视的发展。

OK镜最早起源于美国,在发展过程中曾广受争议,近年来随着OK镜材质的不断优化,逐渐被医学界广泛认可,被誉为“睡觉就能控制和矫治近视的技术”。

OK镜的原理通俗来讲,实际上非常的简单粗暴,就是通过佩戴镜片时产生的外力作用,迫使角膜暂时性变平,减小角膜曲率,暂时性达到矫正近视的目的。

值得注意的一点是,相比于近视手术,佩戴OK镜只是一种对近视的暂时性矫正,如果停戴,视力可能会回复到佩戴前的水平。然而对于青少年而言,它最大的作用在于能够延缓近视发展。青春期时期的孩子,近视度数增长速率往往特别快,而OK镜能够有效抑制度数的增长,等发育生长期过去,就算停戴,也不会出现报复性近视度数加深。同时OK镜有一个最大的好处,就是只需夜间睡眠时佩戴,等到早晨起来摘掉镜片,便可拥有一整天的清晰视力。

说了这么多的好处,再来说说OK会有哪些潜在的危害。

首先,OK镜最大的危险因素在于目前市场鱼龙混杂,不少不法商家以次充好OK镜是与眼角膜直接接触的医疗器械,在购买时一定要保证其材质符合安全标准。2008年2月13日我国国家食品药品监督管理局批准国内首家生产塑形镜的企业,并进一步规范其使用的屈光范围及各类参数。配OK镜一定要去靠谱的机构,

其次,OK镜和眼镜一样,不是标准化的产品,需要经过专业的验配。很多无良商家,甚至完全不经过验配,就把OK镜卖给了客户,不仅无法达到矫正视力的目的,还可能对角膜产生损伤。

最后,OK镜的佩戴及护理也是使用过程中非常重要的一环。由于OK镜的佩戴时间是晚上睡觉前,不少家长因为嫌累,可能会让孩子三天打鱼两天晒网式地佩戴,极大地影响矫正效果。同时,OK镜的摘戴过程中,以及清洗都需要保持高度的洁净,不然很可能引起感染,这非常考验家长的耐心和细心程度。

所以OK镜究竟O不OK,优良的材质,科学的验配,靠谱的家长,这三条缺一不可。如果这三条都能确保,那么OK镜对于青少年视力矫正,真的非常有帮助!


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