- 期刊
- OpenAccess
Preliminary findings of astigmatism and high order aberrations in children after cataract surgery
兒童白內障術後散光及高階像差的初步分析
摘要
Objective: To evaluate the distribution of astigmatism and high order aberrations (HOAs) in children after cataract surgery. Methods: Refractive astigmatism was measured with the Topcon KR800 autorefractor; while HOAs were measured using Pentacam and GALILEI G4. Correlations between astigmatism and HOAs. Results: 9 eyes of 6 subjects with a mean age of 8.33±3.8 years were studied. The average time of follow-up was 6 months. The mean spherical equivalent refractive error was -1.03±3.83D. The mean total astigmatism was -2.78±1.21 D; the mean corneal astigmatism was -2.29±0.72 D; and an 88.9% of rule astigmatism was found in total astigmatism. However, an 80% against-the-rule was found in corneal astigmatism. The most common higher-order aberration was oblique trefoil, with a mean value of -0.57±1.64 μm, followed by vertical trefoil (-0.23±0.85μm) and spherical aberration (-0.21±0.04μm). The third order was the most common order of aberration, followed by the fifth and the fourth, its contribution to total HOA in descending order: 51.92% for the third order, 25.53% for the fifth order, and 22.55% for the fourth order aberrations. Conclusion: Astigmatism mainly occurred from corneal astigmatism, oblique trefoil, vertical trefoil and spherical aberration are the predominant higher-order aberrations in children's eyes that had undergone cataract surgery.
並列摘要
目的：分析兒童白內障術後散光及高階像差的分佈。方法：採用Topcon KR800全自動電腦驗光儀測量散光，Pentacam眼前節分析儀和GALILEI G4眼前節分析儀採集高階像差數據。結果：研究對象：6名兒童（共9隻眼），平均年齡為8.33歲±3.8歲。隨訪時間平均6個月，平均等效球鏡度為-1.03±3.83D，平均總散光為-2.78±1.21D，平均角膜散光為-2.29±0.72D，總散光中順規散光佔88.9%，而在角膜散光中80%為逆規散光。最常見的高階像差是斜三葉草像差，平均值為-0.57±1.64μm，其後的是垂直三葉草像差（-0.23±0.85μm）和球面像差（-0.21±0.04μm）。高階像中第三階佔最多，其次是第五階和第四階，分別為51.92%、25.53%和22.55%。結論：兒童白內障手術後，散光主要來自角膜散光，斜三葉草像差、垂直三葉草像差和球面像差是兒童白內障手術後主要的高階像差。