This study was performed to evaluate histopathologic and physical characteristics of anterior capsule during capsulorhexis with a new high-frequency diathermy.The authors investigated the histopathologic characteristics of anterior capsule according to coagulation time and anterior capsular diameter in diathermy capsulorhesxis(DC),comparing with those in continuous curvilinear capsulorhexis(CCC). Thermally induced histopathologic alter-ation was localized at anterior capsule with coagulation for 0.5 second, while it was extended into cortex with coagulation for 2 seconds.When capsulorhexis was performed with diameter of 6 mmand the margin was pulled with iris retractor,anterior capsular edge was fully extended both in CCC and DC.But with diameter of 3.5 mm,DC mostly led to tear of capsular edge on its extension,while CCC permitted full extension of anterior capsular edge.These results suggest that strength of anterior capsular edge in DC is inferior to that in CCC.However diathermy capsulorhexis is a useful alternative technique in cases,which CCC is difficult to perform,such ashypermature or congenital cataracts.
Capsulorhexis* ; Cataract ; Diathermy* ; Iris

As a growing number of surgeons are perforining cataract extraction by phacoernulsification and the continuous curvilinear capsulorhexis [CCC] has rapidly increased in popularity as the anterior capsulotomy technique, its advantages have been reported recently. But its complications induced by capsular contraction after ccc have been noted, and so we have studied the change in anterior capsular opening area and refractive error after ccc. One surgeon performed cataract extraction using ccc and phacoernulsification, and implanted posterior chamber IOL [optic size 5. 5mm, Pharmacia 812A] in the bag in 48 eyes, and we measured the area of anterior capsular opening and refractive error [spherical equivalent] at I week and 3 months after operation. The average percentage of anterior capsular shrinkage rate at 3 months was 14.8% and showed statistically significant difference [P<0.05], but. had not correlation with initial ccc size. The average refractive change at 3 months was 0. 2D hyperopic shift but did not show statistically significant difference.
Capsulorhexis* ; Cataract Extraction ; Perforin ; Phacoemulsification ; Refractive Errors

PURPOSE: To compare the size, circularity and repeatability between the conventional manual technique and the open-ring guided continuous curvilinear capsulorrhexis (CCC) technique in cataract surgery. METHODS: The present study comprised 120 eyes divided into two equal groups. In the first group (group A), CCC was performed using a 5.3-mm open ring-shaped caliper and in the second group (group B), CCC was performed using the conventional manual technique. Photographs were taken after each surgical step (CCC, phacoemulsification, Intraocular lens insertion and corneal stromal hydration). The diameter, area and circularity of the anterior capsule were compared between the two groups. RESULTS: The anterior capsule diameter was 5.32 +/- 0.26 mm for group A (coefficient of variation 0.049) and 5.14 +/- 0.64 mm for group B (coefficient of variation 0.125); the area was 22.9 +/- 0.71 mm2 for group A (coefficient of variation 0.031) and 21.40 +/- 1.37 mm2 for group B (coefficient of variation 0.064). Circularity was 0.93 +/- 0.24 for group A (coefficient of variation 0.258) and 0.86 +/- 0.78 for group B (coefficient of variation 0.907). CONCLUSIONS: The open ring-guided CCC technique resulted in an increase of diameter and capsulorrhexis area. This method showed superior circularity and repeatability compared to conventional manual technique and can be useful in cataract surgery.
Capsulorhexis* ; Cataract ; Chlormequat ; Eye ; Lenses, Intraocular ; Phacoemulsification

PURPOSE: To compare parameters of femtosecond laser and manual continuous curvilinear capsulorhexis (CCC) using anterior segment optical coherence tomography (AS-OCT). METHODS: Femtosecond laser cataract surgery was performed in 30 eyes of 30 patients, and conventional cataract surgery with a manual CCC in 30 eyes of 30 patients. One month after surgery, CCC diameters, circularity of capsulotomy, and distance between the CCC and pupil center were analyzed using the AS-OCT. RESULTS: Mean maximal CCC diameter was 4.96 +/- 0.23 mm in the femtosecond laser group, and 4.70 +/- 0.82 mm in the manual CCC group. Mean minimal CCC diameter was 4.91 +/- 0.23 mm in the femtosecond group, and 4.48 +/- 0.64 mm in the manual CCC group showing significant difference between the two groups (p = 0.000). Circularity of capsulotomy was 0.99 +/- 0.01 in the femtosecond group and 0.91 +/- 0.13 in the manual CCC group and was statistically different between the 2 groups (p = 0.000). The distance from the CCC center to the pupil center was 0.18 +/- 0.09 mm in the femtosecond group and 0.26 +/- 0.17 mm in the manual CCC group. The CCC center was closer to the pupil center in the femtosecond than in the manual CCC group (p = 0.038). CONCLUSIONS: Properly sized and shaped capsulotomy can be expected in femtosecond laser CCC compared with manual CCC.
Capsulorhexis* ; Cataract* ; Humans ; Pupil ; Tomography, Optical Coherence

PURPOSE: To compare parameters of femtosecond laser and manual continuous curvilinear capsulorhexis (CCC) using anterior segment optical coherence tomography (AS-OCT). METHODS: Femtosecond laser cataract surgery was performed in 30 eyes of 30 patients, and conventional cataract surgery with a manual CCC in 30 eyes of 30 patients. One month after surgery, CCC diameters, circularity of capsulotomy, and distance between the CCC and pupil center were analyzed using the AS-OCT. RESULTS: Mean maximal CCC diameter was 4.96 +/- 0.23 mm in the femtosecond laser group, and 4.70 +/- 0.82 mm in the manual CCC group. Mean minimal CCC diameter was 4.91 +/- 0.23 mm in the femtosecond group, and 4.48 +/- 0.64 mm in the manual CCC group showing significant difference between the two groups (p = 0.000). Circularity of capsulotomy was 0.99 +/- 0.01 in the femtosecond group and 0.91 +/- 0.13 in the manual CCC group and was statistically different between the 2 groups (p = 0.000). The distance from the CCC center to the pupil center was 0.18 +/- 0.09 mm in the femtosecond group and 0.26 +/- 0.17 mm in the manual CCC group. The CCC center was closer to the pupil center in the femtosecond than in the manual CCC group (p = 0.038). CONCLUSIONS: Properly sized and shaped capsulotomy can be expected in femtosecond laser CCC compared with manual CCC.
Capsulorhexis* ; Cataract* ; Humans ; Pupil ; Tomography, Optical Coherence

No Abstract Available.
Adult* ; Capsulorhexis* ; Cataract* ; Follow-Up Studies* ; Humans

PURPOSE: This study evaluates the capsular bag diameter (CBD) with a capsular tension ring (CTR) following cataract surgery and analyzes the predictive factors correlated with capsular bag size to predict CBD preoperatively. METHODS: We inserted the CTR before intraocular lens (IOLs) implantation in 25 eyes undergoing cataract surgery. The axial length (AL), anterior chamber depth (ACD), and lens thickness were measured and keratometry and corneal size were checked preoperatively. Also, the continuous curvilinear capsulorhexis size was measured at 7 days postoperative, and CBD was calculated with CTR in a dilated state at 1day, 1week, 1 month, and 2 months postoperative. RESULTS: The mean CBD gradually decreased from 11.30+/-1.76 mm at 1 day, 10.86+/-1.06 mm at 1 week, 10.23+/-1.43 mm at 1 month, and 9.88+/-1.31 mm at 2 months. The AL (R=0.657), ACD (R=0.481), and corneal size (R=0.348) had a positive correlation with CBD at 1 week postoperative. The AL (P=0.000) and ACD (p=0.015) were statistically significant predictive factors for CBD. CONCLUSIONS: Calculating CBD with the CTR helps to improve visual acuity following cataract surgery after implantation of IOLs having appropriate sizes predicted with AL, ACD, and corneal size.
Anterior Chamber ; Capsulorhexis ; Cataract ; Lenses, Intraocular ; Visual Acuity

To evaluate the abnormal positions of intraocular lens after cataract extraction and intraocular lens implantation, the study used the image analysis technique. Tilting and decent ration of posterior chamber intraocular lens(PCL) were studied according to the anterior capsulotomy. 103 patients(120 eyes) were randomized into 6 groups(20 eyes each) according to posterior chamber lens style and anterior capsulotomy type, and measured the degrees of tilting and decent ration of PCL by Scheimpflug camera. Three piece PCL implantation group showed significant less tilting than one piece PCL implantation group at postoperative 1 week. In one radial tear of anterior capsulotomy group, three piece PCL showed less tilting than one piece PCL. At postoperative 2 months, continuous curvilinear capsulorhexis without radial tear group showed significant less decent ration and tilting than one radial tear group. At postoperative 1 week and 2 months tilting of the continuous curvilinear capsulorhexis group was less than two or more radial tears group. As time passes from 1 week to 2 months tilting decreased significantly, but decentration did not showed significant decrease.
Capsulorhexis ; Cataract Extraction ; Lens Implantation, Intraocular ; Lenses, Intraocular

PURPOSE: To compare the change in the decentration and the tilt of Sensar(R) with Acrysof(R). The optic and haptic portions of the two had a similar composition, but the difference between the two intraocular lens groups was the shape. METHODS: The objects of this study were 59 patients (69 eyes) with Sensar(R) and 44 patients (49 eyes) with Acrysof(R). Each posterior chamber intraocular lens (PCL) was inserted into the capsular bag after continuous curvilinear capsulorhexis and phacoemulsification. The decentration and the tilt of Sensar(R) and Acrysof(R) were measured 1 day, 30 days and 60 days postoperatively using anterior eye segment analysis system (EAS 1000, Nidek, Japan). RESULTS: The decentration of Sensar(R) was significantly lower than that of Acrysof(R) on the 1st and 30th postoperative day but showed no difference on the 60th day. Decentration of Sensar(R) and Acrysof(R) showed no difference on 1st, 30th and 60th postoperative day. CONCLUSIONS: If Sensar(R) and Acrysof(R) are both inserted into the capsular bag adequately, the decentration and the tilt of the two IOLs show no difference on the 60th postoperative day.
Anterior Eye Segment ; Capsulorhexis ; Humans ; Lenses, Intraocular ; Phacoemulsification

PROPOSE: To compare the decentration and tilt between Aquasense(R) and Acrysof(R). METHODS: The subjects of this study were 48 patients (56 eyes) with Aquasense(R) and 44 patients (49 eyes) with Acrysof(R). Each posterior chamber intraocular lens (PCL) was inserted into the capsular bag after continuous curvilinear capsulorhexis and phacoemulsification. The decentration and tilt of Aquasense(R) and Acrysof(R) were measured 1 day, 30 days and 60 days postoperatively using anterior eye segment analysis system (EAS-1000, Nidek, Japan). RESULTS: The decentration showed no difference between Aquasense(R) and Acrysof(R) on 1st (P=0.19), 30th (P=0.07) and 60th (P=0.06) postoperative day. The tilt showed no difference between Aquasense(R) and Acrysof(R) on 1st (P=0.4), 30th (P=0.47) and 60th (P=0.22) postoperative day. CONCLUSIONS: The decentration and tilt of the two intraocular lenses showed no difference on the 60th postoperative day.
Anterior Eye Segment ; Capsulorhexis ; Humans ; Lenses, Intraocular ; Phacoemulsification