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白內障有哪些前兆?千萬別錯過黃金治療時間-台北松山信合美眼科診所
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當光線自瞳孔進入眼睛之後,首先就會經過調節焦距的水晶體。 答:白內障摘除手術是在全身或局部麻醉下施行,將混濁的水晶體在顯微手術下摘除乾淨。 一旦水晶體被摘除,其屈光功能必須由人工的鏡片來代替。

雖然明確的致病機轉還沒確定,但一般確信和紫外光造成的光氧化有關,或許某些毒性或刺激物質也有角色。 水晶體是個非常特別的結構,如果你把眼睛想像成一台相機,水晶體就是相機的鏡頭,可以讓光線穿透,並且折射光線,讓光線匯聚在視網膜上對焦,形成清晰的影像。 車禍、鈍器傷害、尖銳物品的刺傷或穿透性的眼內異物等所引起,其症狀是水晶體囊的破裂,造成水晶體混濁,而導致視力障礙。 手術後二週內避免彎腰、低頭、舉重、咳嗽、噴嚏、揉擦眼睛、跌倒、用力排便等,以防增加眼內壓而導致傷口裂開或出血,並避免俯身洗頭、淋浴、防污水濺入眼內引起感染。

外燴 的手術原理其實很單純,就是把已經退化、混濁的水晶體移除,再植入透明的人工水晶體。 就有點像是相機的鏡頭壞了,把它丟掉換一顆的意思。 舉個例子,假設你是一個司機,夜間看不清楚是很危險的事情,可能在初期的白內障你就需要趕緊手術了。

目前的白內障手術可概括分為兩類,分別為白內障超聲乳化術及囊外白內障摘除手術。 白內障超聲乳化術則屬現代化的二代白內障手術。 一般而言,需要較精密的儀器才能正確診斷白內障,也唯有眼科醫師才能準確操作這些儀器,幫助您解決眼睛的問題。 先天性白內障:由於遺傳性、染色體變異、胎內感染等所引起,嬰兒瞳孔內可見白色或灰色的混濁點,視力發展差。 白內障主要的症狀為無痛、無癢的進行性視力減退。

雖然後續的「移除硬化水晶體碎片」、「清除水晶體囊碎核」等,這些步驟還是需要搭配使用超音波晶體乳化術,但由於能量消耗低,對角膜內皮細胞傷害小,術後視力品質會更佳。 原是明亮,透明的水晶體變成混濁,稱為白內障,它不是腫瘤,也不是皮膚或其他組織新生物,而是水晶體本身變模糊了。 正常時眼睛的水晶體是透明的,當白內障產生時,水晶體變成混濁如毛玻璃。 白內障是因為眼睛的水晶體混濁所造,導致患者視力模糊,畏光、光線周圍出現光圈,光敏感度下降,夜間視力變差等等症狀。 大多數老年性白內障之進展都是漸進式,也有其他型態的白內障(糖尿病患者),則有可能以較快的速度進展。
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