Ultrasound biomicroscopic study of anterior segment changes after phacoemulsification and foldable intraocular lens implantation

Pereira, Frederico Cesar Mafra; Cronemberger, Sebastião

doi:10.1016/s0161-6420(03)00623-7

Cited by 113 publications

(71 citation statements)

References 40 publications

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“…As for the TIA, the present study revealed the difference between preoperative and postoperative was statistically highly significant. The above mentioned result of the present study are supported by similar results reported by other studies [8][9][10].…”

Section: Discussionsupporting

confidence: 94%

Short-Term Study Of IOL Position Changes using Ultrasound Biomicroscopy in High Myopia

Aae¹

2017

IJOES

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In myopic eye with a larger capsular bag, the use of the same IOL size could lead to an insufficient capsular tension, resulting in Abstract Aim: To study the performance of the implanted both one-piece and three-piece IOLs in relation to the enlarged diameters of the capsular bags of the highly myopic eyes. Subjects and Methods: Patient were randomly divided into two groups; group (A), included 25 eyes that underwent phacoemulsification with implantation of one-piece IOLs, Group (B) included 25 eyes that underwent phacoemulsification with implantation of three-piece IOLs. All patients include in this study were high myopes with axial length greater than 26.5 mm. All eyes were planned for clear lens extraction or cataract extraction. Results: In group (A), a statistically significant negative correlation was found between the diameters of the capsular bags and the diameters of the implanted on -piece IOLs. The correlation coefficient (r) is -0.56. In group (B), a statistically significant positive correlation was found between the diameters of the capsular bags and the diameters of the implanted three-piece IOLs. The correlation coefficient (r) is 0.88. Conclusion:The study of this correlation is to help in answering an important question, that is, does one diameter IOL fit every capsular bag? The statistical analyses in both groups point to statistically significant correlation between the diameters of the capsular bags and the diameters of the implanted IOLs i.e. focuses to the divergence between the size of the IOLs and that of the capsular bag.

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Section: Discussionsupporting

confidence: 94%

Short-Term Study Of IOL Position Changes using Ultrasound Biomicroscopy in High Myopia

Aae¹

2017

IJOES

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“…[10][11][12] All these studies confirm using quantitative methods that what has been known clinically as ACA widens after lens removal. An enlarged lens causes narrowing of the ACA.…”

Section: Ophthalmologysupporting

confidence: 66%

The Deterministic Values of Angle Parameters Measured by Ultrasound Biomicroscopy in Patients with Open Angle After Cataract Surgery

Aykan¹,

Salcan²

2013

Turkiye Klinikleri J Med Sci

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A AB BS ST TR RA AC CT T O Ob bj je ec ct ti iv ve e: : To investigate the deterministic values of angle recess area (ARA), angle opening distances at the locations 250 µm (AOD 250 ) and 500 µm (AOD 500 ) anterior to the scleral spur and trabecular-iris angle (TIA) in patients with open angle undergoing cataract surgery. M Ma at te er ri ia al l a an nd d M Me et th ho od ds s: : Thirty-three eyes of 33 patients with open angle undergoing cataract surgery were enrolled in this study. Ultrasound biomicroscopy (UBM) examination was performed preoperatively and 1 month postoperatively under a standard protocol. At each examination, radial sections of the angle at four quadrants were obtained. The images were analyzed using UBM Pro 2000 software for AOD and ARA semiautomatically, and for TIA manually. R Re es su ul lt ts s: : The postoperative increases in the ARA, TIA, AOD 250 and AOD 500 were statistically significant at four quadrants (p<0.0001). The average increase in the ARA was 0.064±0.037 mm² (44%), in the AOD 250 was 0.056±0.02 mm (70%), in the AOD 500 was 0.074±0.03 mm (56%) and in the TIA was 12.3±4.8º (52%). We determined statistically significant correlations between changes in the ARA with AOD 250 (r=0.54, p=0.001) and AOD 500 (r=0.74, p=0.0001). The lowest extraction value was AOD 250 and the highest extraction value was AOD 500 in three quadrants. Differently, the highest extraction value was determined as ARA at the nasal quadrant. C Co on nc cl lu us si io on n: : Our study showed that AOD 500 is as valuable as ARA in patients with open angle in the quantitative evaluation of the angle. This may not be the case in closed or occludable angles. AOD can be used reliably for the evaluation of the angle by the observers having UBM models without image analysis software.K Ke ey y W Wo or rd ds s: : Ultrasonography; anterior eye segment Ö ÖZ ZE ET T A Am ma aç ç: : Katarakt cerrahisi uygulanacak açık açılı hastalarda, açı açıklık alanı (AAA), skleral mahmuzun 250 µm (AAM 250 ) ve 500 µm (AAM 500 ) önündeki lokalizasyonlarda açı açılım mesafesi (AAM), ve trabekülum-iris açısının (TİA) belirleyicilik değerlerini araştırmak. G Ge er re eç ç v ve e Y Yö ön nt te em ml le er r: : Bu çalışmada katarakt ameliyatı olacak açık açılı 33 hastanın 33 gözü çalışmaya dahil edilmiştir. Ameliyat öncesinde ve ameliyattan 1 ay sonra standart bir protokol halinde ultrason biyomikroskopisi (UBM) yapılmıştır. Her muayenede, 4 kadranda açının radial kesitleri elde edilmiştir. Görüntülerde AAM ve AAA, UBM Pro2000 yazılımı ile yarı-otomatik olarak, TİA ise manüel olarak analiz edilmişlerdir. B Bu ul lg gu ul la ar r: : AAA, TİA, AAM 250 ve AAM 500 değerlerindeki ameliyat sonrası artışlar 4 kadranda istatistiksel olarak anlamlıdır. (p<0,0001). AAA'da ortalama artış miktarı 0,064±0,037 mm² (%44), AAM 250 'de 0,056±0,02 mm (%70), AAM 500 'de 0,074±0,03 mm (%56) ve TİA'da 12,3±4,8º (%52)'dir. AAA ile AAM 250 (r=0,54, p=0,001) ve AAM 500 'deki değişiklikler (r=0,74, p=0,0001) arasında istatistiksel olarak önemli korelasyonlar sap...

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“…Marked anterior chamber changes have been reported following cataract surgery with phacoemulsification and foldable IOL implantation, using A-scan ultrasonography, UBM and Scheimpflug photography (Kurimoto et al 1997;Hayashi et al 2000;Pereira & Cronemberger 2003;Altan et al 2004;Nonaka et al 2006). Using UBM, Kurimoto et al (1997) reported that the anterior chamber was 1.37 times deeper and the temporal anterior chamber angle was 1.57 times wider at 3 months after surgery.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies using A-scan ultrasonography or UBM have shown that phacoemulsification with or without IOL implantation results in widening of the ACA and deepening of the anterior chamber in both normal and glaucomatous eyes (Kurimoto et al 1997;Pereira & Cronemberger 2003;Altan et al 2004;Nonaka et al 2006). Furthermore, these changes have been reported to be accompanied by significant decreases in intraocular pressure (IOP) in these eyes (Altan et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Anterior chamber parameters measured by the Pentacam CES after uneventful phacoemulsification in normotensive eyes

Uçakhan

Özkan

Kanpolat

2009

Acta Ophthalmologica

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. Purpose: We set out to quantify changes in the anterior chamber volume (ACV), anterior chamber depth (ACD) and anterior chamber angle (ACA) measurements obtained by the Pentacam rotating Scheimpflug camera following uneventful phacoemulsification surgery in normotensive eyes with open iridocorneal angles. Methods: We enrolled 44 eyes of 44 consecutive patients undergoing cataract extraction in this prospective study. Patients with a history of glaucoma, angle‐closure glaucoma or any other concurrent ocular disease were excluded. A detailed eye examination including intraocular pressure (IOP) measurement was performed and ACV, ACD and inferior, superior, temporal and nasal ACA measurements were obtained in each patient eye using the Pentacam Comprehensive Eye Scanner (Pentacam CES) before and 3 months after phacoemulsification and intraocular lens (IOL) implantation with temporal clear corneal incision. Data were compared using paired t‐test and one‐way anova. Results: Mean preoperative ACV, ACD, ACA and IOP measurements were 164.7 ± 49.8 mm3, 3.0 ± 0.8 mm, 35.7 ± 10.2 ° and 15.8 ± 3.7 mmHg, respectively. Three months postoperatively, mean ACV, ACD, ACA and IOP measurements were 200.9 ± 33.3 mm3, 3.9 ± 0.9 mm, 41.5 ± 6.5 ° and 13.2 ± 3.9 mmHg, respectively. Postoperative mean ACV, ACD and ACA values in all four quadrants were significantly increased (p < 0.0001, p < 0.0001, p < 0.0001, respectively), whereas IOP was significantly reduced (p < 0.0001). Conclusions: The Pentacam CES allowed very easy, fast, automatic and non‐contact quantification of the anterior chamber parameters pre‐ and postoperatively in all patient eyes. Measurements obtained confirm that in normotensive eyes with open iridocorneal angles, the ACV and ACD increase and the ACA widens in all quadrants 3 months after uneventful phacoemulsification and IOL implantation. These changes are accompanied by a significant fall in IOP in the short term.

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Ultrasound biomicroscopic study of anterior segment changes after phacoemulsification and foldable intraocular lens implantation

Cited by 113 publications

References 40 publications

Short-Term Study Of IOL Position Changes using Ultrasound Biomicroscopy in High Myopia

Short-Term Study Of IOL Position Changes using Ultrasound Biomicroscopy in High Myopia

The Deterministic Values of Angle Parameters Measured by Ultrasound Biomicroscopy in Patients with Open Angle After Cataract Surgery

Anterior chamber parameters measured by the Pentacam CES after uneventful phacoemulsification in normotensive eyes

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