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釹雅克雷射水晶體後囊切開術對視力的影響
The Effect of Neodymium:YAG Laser Posterior Capsulotomy on Visual Acuity
摘要
目的：研究釹雅克(neodymium:YAG)雷射後囊切開術(posterior capsulotomy)對最佳眼鏡矯正視力(best spectacle-corrected visual acuity)的影響程度及其相關因素，以作為日後臨床應用時之參考。 方法：患有後發性白內障(after-cataract)的53隻眼（46人）接受為期三個月的追蹤，患眼在治療前以及治療後一週、一個月、三個月時，使用散瞳劑將瞳孔充份散大後，再依照自動驗光的結果來測量病患之最佳眼鏡矯正視力，並使用EAS-1000(上標 ®)(Nidek, Gamagori, Japan)眼前段分析儀測量雷射後囊切開之面積。 結果：在雷射後囊切開術後一週視力即有明顯的改善，這種情況可維持至少三個月；惟視力與後囊切開之面積大小、球面換算值(spherical equivalent)、總散光值(total refractive astigmatism)等等皆無統計上明顯的相關，但與剩餘散光(residual astigmatism)則有明顯相關。 結論：後發性白內障病患在接受雷射後囊切開術後視力會有明顯的進步，剩餘散光的減少可能有助於視力的改善。
關鍵字
無資料並列摘要
Purpose: To evaluate the influence of neodymium:YAG laser posterior capsulotomy on the best spectacle-corrected visual acuity (BSCVA), and to find the relationship between BSCVA and various measurements. Methods: Fifty-three eyes with clinically significant after-cataract of 46 patients were included prospectively. Patients were examined under mydriasis before treatment as well as 1 week, 1 month, and 3 months after treatment. Measurements included refracttive status, BSCVA, and capsulotomy area. Results: The BSCVA gained more than 3 lines at 1 week after laser posterior capsulotomy, and that has persisted for at least 3 months. The BSCVA did not correlate with the capsulotomy area, spherical equivalent, and magnitude of total refractive astigmatism, but negatively correlated with the magnitude of residual astigmatism. Conclusions: Neodymium:YAG laser posterior capsulotomy significantly improved BSCVA soon within 1 week. The effect has maintained for at least 3 months and was associated with the decrement of residual astigmatism.