AIM:To compare the simulated safe distance(SSD)preoperatively versus real safe distance(RSD)postoperatively in patients with iris-claw phakic intraocular lens(p IOL)implantation according to iris configuration.METHODS...AIM:To compare the simulated safe distance(SSD)preoperatively versus real safe distance(RSD)postoperatively in patients with iris-claw phakic intraocular lens(p IOL)implantation according to iris configuration.METHODS:Totally 60 eyes of 60 patients underwent p IOL implantation for surgical correction of myopia.Anterior chamber depth(ACD)was measured with the IOLMaster 700,and nasal and temporal safety distances(SD)were measured pre-and postoperatively using Anterior Segment Visante-OCT.SD was defined as a line measured between the edge of the optic or its simulated image to the endothelium.Eyes were divided into 3 groups:convex,concave,and plane according to preoperatory iris configuration.Statistical analysis was performed using the R program,for the comparison of independent groups and multiple comparisons,the Kruskal-Wallis test and the Dunn test were used respectively.RESULTS:Mean difference between nasal preoperative SSD and postoperative RSD was-0.36±0.38,-0.29±0.48,and-0.18±0.30 mm in the concave,convex,and plane group,respectively.Mean difference between temporal SSD and RSD was-0.36±0.37,-0.14±0.38,and-0.24±0.33 mm in the concave,convex,and plane group,respectively.There were statistically significant differences between SSD and RSS for both nasal and temporal sides in the concave and plane group(P<0.002).CONCLUSION:Preoperative SSD and postoperative RSD for iris-claw p IOL shows significant differences in patients with concave and plane iris.展开更多
<strong>Purpose:</strong> To determine the diagnostic value of the anterior segment optical coherence tomography (AS-OCT) indices in differentiating normal from ectatic corneas. <strong>Material and ...<strong>Purpose:</strong> To determine the diagnostic value of the anterior segment optical coherence tomography (AS-OCT) indices in differentiating normal from ectatic corneas. <strong>Material and Methods:</strong> Two groups of patients—with corneal ectasia and normal controls were compared. Each group consists of 80 eyes of 43 age and sex-matched patients. All of them underwent corneal topography with OCULUS Keratograph 5M and corneal pachymetry with AS-OCT with RTVue-100. The indices generated by the AS-OCT pachymetric scans were analyzed. <strong>Results:</strong> There was a statistically significant difference for all the examined indices between the two groups with p values <0.001 and a confidence interval of 95%. The minimal corneal thickness (Min) was the best performing index according to the ROC analysis with an area under the curve of 0.976 and a combination of sensitivity and specificity of 0.925 and 0.911 respectively, and a “cut-off” value of 484 microns, followed by the indices of focal thinning—Min-Med and Min-Max with an area under the curve of 0.973 and 0.971 and sensitivity/specificity of 0.938/0.962 and 0.938/0.937 respectively. The rest of the examined parameters had an area under the curve in the range between 0.950 for the central corneal thickness and 0.814 for the outer superior segment. <strong>Conclusion:</strong> The anterior segment OCT indices showed excellent capability in differentiating ectatic from normal corneas.展开更多
Dry eye,one of the most frequent ocular surface diseases, is caused by complex ocular function and mechanism disorders. Currently, no uniform standard diagnosis of dry eye has been established. Traditional clinical ex...Dry eye,one of the most frequent ocular surface diseases, is caused by complex ocular function and mechanism disorders. Currently, no uniform standard diagnosis of dry eye has been established. Traditional clinical examinations provide inaccurate measurement and poor reproducibility due to various factors.Anterior segment optical coherence tomography (OCT) is applicable in the diagnosis of dry eye due to its high resolution, non-invasiveness, good accuracy, and repeatability.展开更多
目的探讨前节光学相干断层扫描技术(OCT)对青光眼穿透性小梁手术后滤过泡观察的应用效果,为临床诊治提供客观证据。方法选择2015—2018年间在我院行青光眼穿透性小梁手术的126例患者(126只患眼),在术后1 d～6个月分别进行前节OCT检查,...目的探讨前节光学相干断层扫描技术(OCT)对青光眼穿透性小梁手术后滤过泡观察的应用效果,为临床诊治提供客观证据。方法选择2015—2018年间在我院行青光眼穿透性小梁手术的126例患者(126只患眼),在术后1 d～6个月分别进行前节OCT检查,分析所见滤过泡的变化。结果术后1 d～6个月通过前节OCT检查可见本组患者术后滤过泡总体高度无显著性变化(P>0.05);囊壁厚度呈逐渐变薄趋势,囊壁的反射逐渐增强,微囊泡逐渐减少(滤过泡高度:0.84±0.41 vs 0.96±0.40 vs 0.94±0.36 vs 0.95±0.29 vs 0.96±0.43,F=2.25;囊壁厚度:0.26±0.18 vs0.28±0.20 vs 0.16±0.11 vs 0.15±0.16 vs 0.21±0.17,F=15.27;出现微囊泡:126/(100.0%) vs 108/(85.7%) vs 89/(70.6%)vs 58/(46.0%) vs 61/(48.4%),F=131.661 9;囊壁反射增强:0/(0.0%) vs 18/(14.3%) vs 37/(29.4%) vs 71/(56.3%) vs 64/(50.8%),F=136.022 7;均P<0.01)。结论前节OCT能够探明术后滤过泡外观、内部结构的变化,通过分析这些变化与其功能之间的关系,可为滤过泡的功能维护提供参考依据,是对青光眼术后滤过泡形态进行评价的一种有效工具。展开更多
目的分析和探讨不同程度青少年近视在不同阅读距离诱导的调节状态下眼前段结构的变化。方法收集我院屈光门诊14～18岁间青少年近视95例(95眼),正视眼34例(34眼)作对照,其中男66例,女63例。所有被试者行主觉验光、调节幅度测定,眼前节OC...目的分析和探讨不同程度青少年近视在不同阅读距离诱导的调节状态下眼前段结构的变化。方法收集我院屈光门诊14～18岁间青少年近视95例(95眼),正视眼34例(34眼)作对照,其中男66例,女63例。所有被试者行主觉验光、调节幅度测定,眼前节OCT测量在不同阅读距离诱导的调节状态下(0D、3D、6D)的前房深度、晶状体厚度及瞳孔直径,采用SPSS11.5 for Windows行统计学分析。结果①在调节放松情况下,随着近视度数增加,暗瞳直径明显减小(P<0.05),各组间晶状体厚度差异无显著性,前房深度差异有显著性(P<0.05)。②随着阅读距离的减小,调节运用的增加,各组前房深度变浅值、晶状体厚度变厚值、暗瞳直径变小值均显著增加(P<0.01)。③随着近视度数增高,诱发3D调节时前房深度变浅值显著增加(P<0.01),晶状体厚度变厚值明显增加(P<0.05),暗瞳直径变小值差异无显著性。④随着近视度数增高,诱发6D调节时前房深度变浅值显著增加(P<0.01),晶状体厚度变厚值明显增加(P<0.05),暗瞳直径变小值显著增加(P<0.01)。结论在青少年中,随近视程度加深,阅读距离减小,运用调节量的增加可引起眼前房显著变浅,晶状体明显变厚;暗瞳直径缩小值在诱发6D调节时随近视度数增高而增大。展开更多
文摘AIM:To compare the simulated safe distance(SSD)preoperatively versus real safe distance(RSD)postoperatively in patients with iris-claw phakic intraocular lens(p IOL)implantation according to iris configuration.METHODS:Totally 60 eyes of 60 patients underwent p IOL implantation for surgical correction of myopia.Anterior chamber depth(ACD)was measured with the IOLMaster 700,and nasal and temporal safety distances(SD)were measured pre-and postoperatively using Anterior Segment Visante-OCT.SD was defined as a line measured between the edge of the optic or its simulated image to the endothelium.Eyes were divided into 3 groups:convex,concave,and plane according to preoperatory iris configuration.Statistical analysis was performed using the R program,for the comparison of independent groups and multiple comparisons,the Kruskal-Wallis test and the Dunn test were used respectively.RESULTS:Mean difference between nasal preoperative SSD and postoperative RSD was-0.36±0.38,-0.29±0.48,and-0.18±0.30 mm in the concave,convex,and plane group,respectively.Mean difference between temporal SSD and RSD was-0.36±0.37,-0.14±0.38,and-0.24±0.33 mm in the concave,convex,and plane group,respectively.There were statistically significant differences between SSD and RSS for both nasal and temporal sides in the concave and plane group(P<0.002).CONCLUSION:Preoperative SSD and postoperative RSD for iris-claw p IOL shows significant differences in patients with concave and plane iris.
文摘<strong>Purpose:</strong> To determine the diagnostic value of the anterior segment optical coherence tomography (AS-OCT) indices in differentiating normal from ectatic corneas. <strong>Material and Methods:</strong> Two groups of patients—with corneal ectasia and normal controls were compared. Each group consists of 80 eyes of 43 age and sex-matched patients. All of them underwent corneal topography with OCULUS Keratograph 5M and corneal pachymetry with AS-OCT with RTVue-100. The indices generated by the AS-OCT pachymetric scans were analyzed. <strong>Results:</strong> There was a statistically significant difference for all the examined indices between the two groups with p values <0.001 and a confidence interval of 95%. The minimal corneal thickness (Min) was the best performing index according to the ROC analysis with an area under the curve of 0.976 and a combination of sensitivity and specificity of 0.925 and 0.911 respectively, and a “cut-off” value of 484 microns, followed by the indices of focal thinning—Min-Med and Min-Max with an area under the curve of 0.973 and 0.971 and sensitivity/specificity of 0.938/0.962 and 0.938/0.937 respectively. The rest of the examined parameters had an area under the curve in the range between 0.950 for the central corneal thickness and 0.814 for the outer superior segment. <strong>Conclusion:</strong> The anterior segment OCT indices showed excellent capability in differentiating ectatic from normal corneas.
文摘Dry eye,one of the most frequent ocular surface diseases, is caused by complex ocular function and mechanism disorders. Currently, no uniform standard diagnosis of dry eye has been established. Traditional clinical examinations provide inaccurate measurement and poor reproducibility due to various factors.Anterior segment optical coherence tomography (OCT) is applicable in the diagnosis of dry eye due to its high resolution, non-invasiveness, good accuracy, and repeatability.
文摘目的探讨前节光学相干断层扫描技术(OCT)对青光眼穿透性小梁手术后滤过泡观察的应用效果,为临床诊治提供客观证据。方法选择2015—2018年间在我院行青光眼穿透性小梁手术的126例患者(126只患眼),在术后1 d～6个月分别进行前节OCT检查,分析所见滤过泡的变化。结果术后1 d～6个月通过前节OCT检查可见本组患者术后滤过泡总体高度无显著性变化(P>0.05);囊壁厚度呈逐渐变薄趋势,囊壁的反射逐渐增强,微囊泡逐渐减少(滤过泡高度:0.84±0.41 vs 0.96±0.40 vs 0.94±0.36 vs 0.95±0.29 vs 0.96±0.43,F=2.25;囊壁厚度:0.26±0.18 vs0.28±0.20 vs 0.16±0.11 vs 0.15±0.16 vs 0.21±0.17,F=15.27;出现微囊泡:126/(100.0%) vs 108/(85.7%) vs 89/(70.6%)vs 58/(46.0%) vs 61/(48.4%),F=131.661 9;囊壁反射增强:0/(0.0%) vs 18/(14.3%) vs 37/(29.4%) vs 71/(56.3%) vs 64/(50.8%),F=136.022 7;均P<0.01)。结论前节OCT能够探明术后滤过泡外观、内部结构的变化,通过分析这些变化与其功能之间的关系,可为滤过泡的功能维护提供参考依据,是对青光眼术后滤过泡形态进行评价的一种有效工具。
文摘目的分析和探讨不同程度青少年近视在不同阅读距离诱导的调节状态下眼前段结构的变化。方法收集我院屈光门诊14～18岁间青少年近视95例(95眼),正视眼34例(34眼)作对照,其中男66例,女63例。所有被试者行主觉验光、调节幅度测定,眼前节OCT测量在不同阅读距离诱导的调节状态下(0D、3D、6D)的前房深度、晶状体厚度及瞳孔直径,采用SPSS11.5 for Windows行统计学分析。结果①在调节放松情况下,随着近视度数增加,暗瞳直径明显减小(P<0.05),各组间晶状体厚度差异无显著性,前房深度差异有显著性(P<0.05)。②随着阅读距离的减小,调节运用的增加,各组前房深度变浅值、晶状体厚度变厚值、暗瞳直径变小值均显著增加(P<0.01)。③随着近视度数增高,诱发3D调节时前房深度变浅值显著增加(P<0.01),晶状体厚度变厚值明显增加(P<0.05),暗瞳直径变小值差异无显著性。④随着近视度数增高,诱发6D调节时前房深度变浅值显著增加(P<0.01),晶状体厚度变厚值明显增加(P<0.05),暗瞳直径变小值显著增加(P<0.01)。结论在青少年中,随近视程度加深,阅读距离减小,运用调节量的增加可引起眼前房显著变浅,晶状体明显变厚;暗瞳直径缩小值在诱发6D调节时随近视度数增高而增大。
