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

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

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

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

Small incision cataract surgery has many advantages such as less induced corneal astigmatism, fast visual recovery, and fast rehabilitation. We had implatned the newly developed Staar AA-4203 foldable silicone IOL in the ag of 100 cataractous eye and followed for at least 3 months (3-0 months, mean 6 months). Silicone IOLs were implanted using a specific injector through 4mm scleral pocket incision after continuous circular capsulorhexis and bimanual phacoemulsification. The lenses were centered well in 99% of eyes. Tear of anterior capsule occurred in one eye (1%), and tear of both anterior and posterior cassule occurred in another one eye (1%) during IOL implatation. The IOL was displaced into the vitreous in the latter eye, which was reoperated. The preoperative and postoperative cornedal astigmatism at 1 day, 1 month, 2 month and 3 month was -O.14 +/- 0.83 D of with the rule astigmatism (WTR), -0.55 +/- 1.06 D of WTR, -0.28 +/- 0.91 D of WTR, -0.07 +/- 0.81 D of WTR, and O.01 +/- 0.84 D of against the rule astigmatism respectively. Uncorrected VA of 1.0 was 35% at postoperative 1 day, 52% at 1 month, 48% at 2 month. Corrected VA of 1.0 was 65% at postoperative 1 day, 87% at 1 month, 88% at 2 month. Inflammatory reaction in the anterior chamber and vitreous had subsided within one or two months without any complications in 99% of eyes. Fibrinous membrane on the suface of IOL occurred in 2 eyes (2%), one of which caused grave sequelae. The results, although it showed early postoperative results, reflected that the above silicone foldable IOL fitted to the small incision cataract surgery guaranteed us the safety and fast visual recovery.
Anterior Chamber ; Astigmatism ; Capsulorhexis ; Cataract ; Fibrin ; Membranes ; Phacoemulsification ; Rehabilitation ; Silicones*

PURPOSE: To present postoperative refractive changes in patients with optic capturing. METHODS: This retrospective review was comprised of 81 eyes of 69 presenile and senile cataract patients who had undergone cataract surgeries, and 20 eyes of 11 pediatric cataract patients who had undergone irrigation and aspiration of the cataract, posterior continuous curvilinear capsulorhexis (PCCC) and optic capturing. Presenile and senile cataract patients were divided into three groups: Group I: Phacoemulsification with posterior chamber lens implantation (Phaco with PCL), 37 eyes; Group II: Phaco with PCL and PCCC, 22 eyes; Group III: Phaco with PCL, PCCC and optic capturing, 22 eyes. Preoperative target refractive error and postoperative refractive errors were compared postoperatively. RESULTS: Hyperopic shiftings were noticed in Groups I and II, but were not statistically significanct. However, statistically significant hyperopic shifting was found in Group III. In pediatric populations, we found no statistically significant refractive changes. CONCLUSIONS: PCCC alone does not cause refractive change postoperatively. When performing optic capturing, postoperative hyperopic shifting must be considered.
Capsulorhexis ; Cataract ; Humans ; Lenses, Intraocular ; Phacoemulsification ; Refractive Errors ; Retrospective Studies

The effect of capsular tension ring[CTR]on prevention of contraction of capsular opening induced by continuous curvilinear capsulorhexis in cataract surgery has been evaluated. In this study, we performed cataract surgery on 15 patients[23 eyes]in Group I[IOL implantation with CTR] and 13 patients[24 eyes]in Group II[IOL implantation without CTR]from September 1998 to November 1998. We compared uncorrected visual acuity[UCVA], spherical equivalent[SE], astigmatism, size of capsular opening, IOL rotation and change of anterior chamber depth between two Groups. We used image analysis system to determine an actual size of capsular opening and measured a depth of anterior chamber than 5 times by using A-scan ultrasound. GroupIand IIshowed a similar pattern of change of UCVA, SE and astigmatism. Contraction rate of capsular opening 2 months after operation was 1.41%in Group Iand 3.95%in Group II. This difference was statistically significant [p<0.001].The anterior chamber depth increased temporarily in both groups, However, it was slightly decreased and maintained in Group I, while steadily decreased in Group II. Rotation of IOL was greater in Group IIthan Group I. However, it was not statistically significant. With these results it would be concluded that CTR might prevent a contraction of capsular opening and enhance a stability of IOL.
Anterior Chamber ; Astigmatism ; Capsulorhexis ; Cataract* ; Lenses, Intraocular* ; Ultrasonography

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