星期日 2024年 4月 28日
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不是高危险群 也会视网膜剥离

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看东西一直感觉有蚊子在飞,有时候还可以看到闪电,且状况越来越严重?当心没有高度近视、家族史及不需常用眼看电脑,也可能视网膜剥离!

眼球内部充满着如蛋清般透明的玻璃体,而视网膜紧紧靠贴在玻璃体的后膜,随着老化或因为眼睛外伤、眼内发炎等因素,原本致密透明的玻璃体会液化、收缩、拉扯,导致玻璃体眼球的色素上皮与靠接的视网膜感光层分离开来,就是“视网膜剥离”。

视网膜在发生剥离时,并不会立即造成疼痛,有些病患初期会看到眼前有漂浮的黑点、黑影,即俗称飞蚊症的症状;也有人会看到像是闪光的线或是一大片黑影,但视力仍不受影响。

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不过这是初期,一旦到了晚期,看东西时影像扭曲,或出现视野缺损及视力减退,这是因为当视网膜发生剥离时,感光细胞虽无法吸收来自脉络膜的养分,一开始状况还不会很明显,一直到感光细胞渐渐退化丧失感光的功能并死亡,视觉功能便开始受到影响,最终导致失明。

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眼睛曾遭到外力重击,最常见就是被网球或羽球打到,在被打到的当下,可能痛个2、3天,外观看来没事,但视网膜可能因瞬间振动产生拉扯,便会造成裂孔性视网膜剥离;另外,泡温泉,先是将头浸泡在水中,且是冷热水交替,后来又去按摩眼球,也可能使视网膜剥离。

但若为视网膜剥离的高危险群,如高度近视、有视网膜剥离家族史者,应定期放大瞳孔施行视网膜检查,若检查出有裂孔,应施予雷射治疗,若没有裂孔或仅有变薄的地方,可以施打预防性的雷射或定期追踪即可。

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