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青光眼的治療:激光
 

青光眼的治療:激光

青光眼的治療主要以降低眼壓為目標,除了用眼藥水和手術外,激光也是一種常用的治療方法。激光是指通過受激輻射而產生的放大光束,能透過熱能和電磁效應,對生物組織造成凝固、汽化和穿透等作用。

不同類型的青光眼需配合不同類型的激光治療,例如處理閉角性青光眼會利用激光使周邊虹膜向內移,打開房角,協助房水排出,也可作激光虹膜穿透術,在虹膜上做一個小孔,使前房內的房水能自由迴轉,防止房角閉合,窒礙房水排出。

對於開角性青光眼,如藥物未能有效控制眼壓,可考慮用激光小樑網成形術,透過激光熱能使小樑結構重建,減少房水向外流的阻力,加快排水,降低眼壓。而對於血管增生性青光眼,則可用睫狀體光凝術,破壞睫狀體製造房水的細胞,減少生產,控制眼壓。

激光治療的好處是只需局部痲醉、時間短、無傷口、沒有明顯疼痛,病人可立即恢復日常生活等,主要副作用包括短暫眼壓上升,前房出血、發炎,晶體或視網膜受損,但發生機會很小,也多半可用藥物改善。

 

作者為香港眼科醫院眼科專科醫生李琬微

李琬微醫生 DR. LI YUEN MEI, EMMY

資料來源: AM730 (05-01-2015)

選文來自: 香港E大夫/醫大夫

 

 

E大夫醫生網是香港人最喜愛的醫療網站

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