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眼科診所
若術前僅餘顳(外)側視野,視力在白內障手術後是不會獲得改善的,只是會覺得稍微變亮一些。 如果白內障手術前眼壓無法以藥物獲得良好控制時,則白內障手術最好由同時精於青光眼及白內障手術的醫師進行之。 外燴 由於青光眼手術的風險高於白內障手術,若非絕對必要,否則能免則免。 醫師會根據病患眼壓及視神經狀況,決定是否同時進白內障及青光眼手術。
5.艾目明 阿法根:主要作用在特定交感神經接受器上,可同時降低房水的產生,也會使房水的流出途徑更加通暢。 four.前列腺激素類如舒而坦:作用途徑是將另一條在人類較不發達的房水通道打開,增加另一條房水排出的管道。
前房內充滿了房液,這液體會不斷地產生,進入前房,然後由前房隅角的小管道排出眼球外,以維持眼球內恒定的壓力。 這些因素會導致前房液排出受阻,無法穩定地排出,則房液積聚在眼球內,造成眼壓升高,若超過正常眼所能忍受眼壓的程度,即為「青光眼」。 因為病因的不同,個人體質的差異都會有很大的影響。
一般正常的眼壓是 10 至 20 毫米汞柱之間。 但也有一群病人眼壓正常,但是視神經已經萎縮,視野也有造成缺損。 相反的,有一群人卻是眼壓高於正常,但是他們的視神經可能一輩子都沒問題。 除此之外,我們也要考慮眼壓有晝夜變化,因此不能以單一次的眼壓來作為診斷的依據。
一般而言,青光眼可以分為幾種型態,原發型最多的是隅角開放型及隅角閉鎖型,次發型的種類就比較多,可能是受傷引起或是因其它眼睛疾病所造成的,甚至是點了其它藥物引起的 (如類固醇的藥水)。 青光眼是一種常見的眼睛疾病,也是導致失明約主要原因之一;雖然不會傳染但會遺傳。 國人青光眼的罹患率,四十歲以上的中年人約為百分之一。
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