【目的】观察不同年龄段人群实测与6.0 mm瞳孔直径下全角膜和前角膜球面像差的差异。【方法】观察不同年龄段(20~29, 30~39, 40~49, 50~59, 60~69, 70~79)共100例受试者,通过Sirius眼前节分析系统检测不同瞳孔直径下(2.0 mm, 2.5 mm, 3....【目的】观察不同年龄段人群实测与6.0 mm瞳孔直径下全角膜和前角膜球面像差的差异。【方法】观察不同年龄段(20~29, 30~39, 40~49, 50~59, 60~69, 70~79)共100例受试者,通过Sirius眼前节分析系统检测不同瞳孔直径下(2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm)全角膜和前角膜球面像差及暗环境下实测瞳孔直径,通过数学拟合曲线计算出该实测瞳孔直径下全角膜和前角膜的球面像差值,分别比较其与6.0 mm瞳孔直径下全角膜与前角膜球面像差之间的差异。【结果】实测瞳孔直径与年龄呈负相关(P 0.05)。在60~69,70~79年龄段,实测全角膜和前角膜球面像差均显著低于6.0 mm瞳孔直径下对应参数(P 【0.05)。在20~29,30~39,70~79年龄段,实测全角膜与前角膜球面像差间有显著性差异(P 【0.05);在6.0 mm瞳孔直径下,全角膜球面像差值在30~39,40~49,60~69年龄段显著低于前角膜对应值(P 【0.05)。【结论】老年人群中实测瞳孔直径下全和前角膜球面像差均显著小于6.0 mm瞳孔直径下对应参数,此差异与老年人群实际平均瞳孔直径较小有关。在实测和6.0 mm瞳孔直径下,全与前角膜球面像差在部分年龄段存在差异,两者有显著性差异的年龄段分布不同。所测前角膜球面像差不能完全代替全角膜球面像差,建议以实测全角膜球面像差值作为白内障手术选择消球差人工晶状体类型的依据。展开更多
AIM:To investigate and compare the visual and refractive outcomes of small incision lenticule extraction(SMILE),laser assisted sub-epithelial keratomileusis(LASEK),and LASEK combined with corneal collagen cross-linkin...AIM:To investigate and compare the visual and refractive outcomes of small incision lenticule extraction(SMILE),laser assisted sub-epithelial keratomileusis(LASEK),and LASEK combined with corneal collagen cross-linking(LASEKCXL)surgery in patients with less than 500μm of central corneal thickness(CCT).METHODS:The retrospective medical records review was conducted on the patients with CCT less than 500μm treated with SMILE,LASEK,and LASEK-CXL.There was a total of 172 eyes,76 eyes were in the SMILE group,53 eyes in the LASEK group,and 43 eyes in the LASEK-CXL group.Uncorrected distance visual acuity(UDVA),spherical equivalent refraction(SE),and corneal haze were followed up in the three groups for 12 mo.RESULTS:At 12 mo postoperatively,there were no statistically significant differences in UDVA and in the absolute value of SE between the three groups.The predictability within±0.50 D in the SMILE group(85.5%)was significantly higher than in both the LASEK group(64.2%,P<0.01)and the LASEK-CXL group(69.8%,P=0.04).The efficacy index and safety index were not significantly different among the three groups.Corneal haze at 12 mo postoperatively was higher in the LASEK-CXL group(27.9%)than in the SMILE group(2.6%,P<0.01)and in the LASEK group(7.5%,P<0.01).CONCLUSION:In patients with CCT less than 500μm,SMILE,LASEK,and LASEK-CXL appear to be effective for myopic correction.Among them,SMILE surgery shows the highest predictability.展开更多
文摘【目的】观察不同年龄段人群实测与6.0 mm瞳孔直径下全角膜和前角膜球面像差的差异。【方法】观察不同年龄段(20~29, 30~39, 40~49, 50~59, 60~69, 70~79)共100例受试者,通过Sirius眼前节分析系统检测不同瞳孔直径下(2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm)全角膜和前角膜球面像差及暗环境下实测瞳孔直径,通过数学拟合曲线计算出该实测瞳孔直径下全角膜和前角膜的球面像差值,分别比较其与6.0 mm瞳孔直径下全角膜与前角膜球面像差之间的差异。【结果】实测瞳孔直径与年龄呈负相关(P 0.05)。在60~69,70~79年龄段,实测全角膜和前角膜球面像差均显著低于6.0 mm瞳孔直径下对应参数(P 【0.05)。在20~29,30~39,70~79年龄段,实测全角膜与前角膜球面像差间有显著性差异(P 【0.05);在6.0 mm瞳孔直径下,全角膜球面像差值在30~39,40~49,60~69年龄段显著低于前角膜对应值(P 【0.05)。【结论】老年人群中实测瞳孔直径下全和前角膜球面像差均显著小于6.0 mm瞳孔直径下对应参数,此差异与老年人群实际平均瞳孔直径较小有关。在实测和6.0 mm瞳孔直径下,全与前角膜球面像差在部分年龄段存在差异,两者有显著性差异的年龄段分布不同。所测前角膜球面像差不能完全代替全角膜球面像差,建议以实测全角膜球面像差值作为白内障手术选择消球差人工晶状体类型的依据。
文摘AIM:To investigate and compare the visual and refractive outcomes of small incision lenticule extraction(SMILE),laser assisted sub-epithelial keratomileusis(LASEK),and LASEK combined with corneal collagen cross-linking(LASEKCXL)surgery in patients with less than 500μm of central corneal thickness(CCT).METHODS:The retrospective medical records review was conducted on the patients with CCT less than 500μm treated with SMILE,LASEK,and LASEK-CXL.There was a total of 172 eyes,76 eyes were in the SMILE group,53 eyes in the LASEK group,and 43 eyes in the LASEK-CXL group.Uncorrected distance visual acuity(UDVA),spherical equivalent refraction(SE),and corneal haze were followed up in the three groups for 12 mo.RESULTS:At 12 mo postoperatively,there were no statistically significant differences in UDVA and in the absolute value of SE between the three groups.The predictability within±0.50 D in the SMILE group(85.5%)was significantly higher than in both the LASEK group(64.2%,P<0.01)and the LASEK-CXL group(69.8%,P=0.04).The efficacy index and safety index were not significantly different among the three groups.Corneal haze at 12 mo postoperatively was higher in the LASEK-CXL group(27.9%)than in the SMILE group(2.6%,P<0.01)and in the LASEK group(7.5%,P<0.01).CONCLUSION:In patients with CCT less than 500μm,SMILE,LASEK,and LASEK-CXL appear to be effective for myopic correction.Among them,SMILE surgery shows the highest predictability.