Abstract：
OBJECTIVE: To compare 3 capsulotomy centration methods.
METHODS: Private clinic, Zlin, Czech Republic.
METHODS: Prospective, consecutive case series.
METHODS: 180 eyes undergoing cataract surgery had anterior capsule staining with microfiltered 0.4% trypan blue solution before selective laser capsulotomy. The first 60 eyes (Group 1) had mydriatic dilated pupil centered capsulotomies. The next 60 eyes (Group 2) were centered on the trypan blue central landmark (TCL). The final 60 capsulotomies (Group 3) were centered on the patient fixated coaxial Purkinje reflex (CPR). Measurements between key anatomical landmarks and the TCL, CPR capsulotomies, and implanted intraocular lens (IOL) center were made.
RESULTS: The TCL, observed in >94% of eyes in the study, coincided with the CPR with a displacement of <0.1 ± 0.1 mm. Group 1 capsulotomies were noticeably decentered on the IOLs by 0.3 ± 0.2 mm. The Group 2 symmetrical IOL relationship was maintained with a decentration of 0.15 ± 0.1 mm. Group 3 had a similar decentration with the IOLs with 0.15 ± 0.1 mm. Verification with IOLMaster 700 data and CALLISTO Eye System showed that the CPR and the TCL were coincident with the measured visual axis.
CONCLUSIONS: The clearly visible TCL served as an alternate landmark to the patient fixated CPR, and being on the anterior capsule was not sensitive to tilt. Further patient compliance was not required. Both were superior to dilated pupil centration, to achieve symmetric IOL coverage. This has application for both capsulotomies and capsulorhexes.
METHODS: Private clinic, Zlin, Czech Republic.
METHODS: Prospective, consecutive case series.
METHODS: 180 eyes undergoing cataract surgery had anterior capsule staining with microfiltered 0.4% trypan blue solution before selective laser capsulotomy. The first 60 eyes (Group 1) had mydriatic dilated pupil centered capsulotomies. The next 60 eyes (Group 2) were centered on the trypan blue central landmark (TCL). The final 60 capsulotomies (Group 3) were centered on the patient fixated coaxial Purkinje reflex (CPR). Measurements between key anatomical landmarks and the TCL, CPR capsulotomies, and implanted intraocular lens (IOL) center were made.
RESULTS: The TCL, observed in >94% of eyes in the study, coincided with the CPR with a displacement of <0.1 ± 0.1 mm. Group 1 capsulotomies were noticeably decentered on the IOLs by 0.3 ± 0.2 mm. The Group 2 symmetrical IOL relationship was maintained with a decentration of 0.15 ± 0.1 mm. Group 3 had a similar decentration with the IOLs with 0.15 ± 0.1 mm. Verification with IOLMaster 700 data and CALLISTO Eye System showed that the CPR and the TCL were coincident with the measured visual axis.
CONCLUSIONS: The clearly visible TCL served as an alternate landmark to the patient fixated CPR, and being on the anterior capsule was not sensitive to tilt. Further patient compliance was not required. Both were superior to dilated pupil centration, to achieve symmetric IOL coverage. This has application for both capsulotomies and capsulorhexes.
摘要：
目的：比较3种囊切开术定心方法。
方法：私人诊所，兹林,捷克共和国。
方法：前瞻性，连续病例系列。
方法：接受白内障手术的180只眼在选择性激光囊切开术前用微过滤的0.4％台盼蓝溶液进行前囊染色。前60只眼（第1组）进行了散瞳扩大的瞳孔集中的囊切开术。接下来的60只眼睛（第2组）集中在台盼蓝中央标志（TCL）上。最后60例（第3组）以患者固定的同轴浦肯野反射（CPR）为中心。关键解剖标志和TCL之间的测量，CPR囊切开术,制作人工晶状体(IOL)植入中心。
结果：TCL，在研究中观察到>94%的眼睛，与CPR重合，位移<0.1±0.1mm。第1组的囊切开术在IOL上明显缩小了0.3±0.2mm。第2组对称IOL关系保持为0.15±0.1mm的偏心。第3组具有与0.15±0.1mm的IOL相似的偏心。使用IOLMaster700数据和CALLISTOEyeSystem进行的验证表明，CPR和TCL与测得的视轴重合。
结论：清晰可见的TCL作为患者固定CPR的替代标志，在前囊上对倾斜不敏感。不需要进一步的患者依从性。两者都优于散瞳中心，实现对称IOL覆盖。这适用于囊袋切开术和撕囊术。
方法：私人诊所，兹林,捷克共和国。
方法：前瞻性，连续病例系列。
方法：接受白内障手术的180只眼在选择性激光囊切开术前用微过滤的0.4％台盼蓝溶液进行前囊染色。前60只眼（第1组）进行了散瞳扩大的瞳孔集中的囊切开术。接下来的60只眼睛（第2组）集中在台盼蓝中央标志（TCL）上。最后60例（第3组）以患者固定的同轴浦肯野反射（CPR）为中心。关键解剖标志和TCL之间的测量，CPR囊切开术,制作人工晶状体(IOL)植入中心。
结果：TCL，在研究中观察到>94%的眼睛，与CPR重合，位移<0.1±0.1mm。第1组的囊切开术在IOL上明显缩小了0.3±0.2mm。第2组对称IOL关系保持为0.15±0.1mm的偏心。第3组具有与0.15±0.1mm的IOL相似的偏心。使用IOLMaster700数据和CALLISTOEyeSystem进行的验证表明，CPR和TCL与测得的视轴重合。
结论：清晰可见的TCL作为患者固定CPR的替代标志，在前囊上对倾斜不敏感。不需要进一步的患者依从性。两者都优于散瞳中心，实现对称IOL覆盖。这适用于囊袋切开术和撕囊术。
