scholarly journals Assessment of anterior chamber angle changes after phacoemulsification with swept-source OCT

2021 ◽  
Vol 14 (10) ◽  
pp. 1527-1532
Author(s):  
Qian Zheng ◽  
◽  
Zhang-Liang Li ◽  
Ping-Jun Chang ◽  
Yun-E Zhao ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Cataract Surgery ◽  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Narrow Angle ◽  
Significant Difference ◽  
Shallow Anterior Chamber ◽  
Chamber Angle

AIM: To assess the changes of anterior chamber angle in patients with shallow anterior chamber after phacoemulsification combined with intraocular lens (IOL) implantation, based on anterior segment swept-source optical coherence tomography (AS-SS-OCT) measurements. METHODS: This was a prospective case control study; sixty eyes of sixty case were scheduled for cataract surgery with normal intraocular pressure (IOP). Based on anterior chamber depth (ACD) and gonioscopy findings, the eyes were divided into two groups: group of shallow anterior chamber and narrow angle (SAC group, 30 eyes); and group of normal anterior chamber group with wide angle (NAC group, 30 eyes). Measurements of ACD, anterior chamber volume (ACV), iris volume (IV), lens vault (LV), angle opening distance (AOD), angle recess area (ARA), trabecular iris space area (TISA), and trabecular iris angle (TIA) were conducted in each group before and 3mo after surgery. RESULTS: There was no significant difference in age, axial length (AL), corneal curvature, corneal diameter, intraocular pressure, and IV between two groups before surgery, except for the LV (P=0.000). ACD and ACV were prominently larger in the NAC group than the SAC group 3mo after operation (3.69±0.38 vs 3.85±0.39 mm, P=0.025; 161.37±19.47 vs 178.26±20.30 mm3, P=0.002). AOD750, ARA750 in nasal and inferior quadrants, TISA750 in all quadrants except temporal, and TIA750 in all quadrants in SAC group were significantly smaller than those in NAC group after operation (all P<0.05). CONCLUSION: Cataract surgery can deepen anterior chamber and increase the width of anterior chamber angle in Chinese subjects, but the angle related parameters including AOD750, ARA750, TISA750, TIA, TISA750, and ACV in patients with shallow anterior chamber and narrow angle do not reach the normal level.

scholarly journals Assessment of anterior chamber configuration changes after phacoemulsification with swept-source optical coherence tomography

2020 ◽  
Author(s):  
Man Hu ◽  
Qian Zheng ◽  
Zhangliang Li ◽  
Pingjun Chang ◽  
Yun-e Zhao
Keyword(s):  
Optical Coherence Tomography ◽  
Cataract Surgery ◽  
Anterior Chamber ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Narrow Angle ◽  
Significant Difference ◽  
Shallow Anterior Chamber ◽  
Chamber Angle

Abstract Background: To assess the changes of anterior chamber angle in patients with shallow anterior chamber and normal anterior chamber after phacoemulsification and intraocular lens implantation (IOL) using anterior segment swept-source optical coherence tomography (AS-SS-OCT). Methods: This was a prospective case control study; 60 eyes of 60 patients who scheduled for cataract surgery with normal intraocular pressure (IOP). Based on anterior chamber depth (ACD) and gonioscopy findings, the eyes were classified into two groups: shallow anterior chamber group with narrow angle (SAC group, 30 eyes)；and normal anterior chamber group with wide angle (NAC group, 30 eyes). Measurements of ACD, anterior chamber volume (ACV), Iris volume (IV), lens vault (LV) , angle opening distance (AOD), angle recess area (ARA), trabecular iris space area (TISA), and trabecular iris angle (TIA) were conducted in each group before and 3 months after surgery. Differences between the two groups were compared. Results: There was no significant difference in age, axial length (AL), corneal curvature, corneal diameter, IOP and IV between the SAC group and the NAC group before operation, except for the LV (p = 0.000). All angle parameters including ACD, ACV, AOD, ARA, TISA and TIA in both groups at 3 months post-surgery were significantly different from the preoperative values (p<0.01). In addition, there were significant differences in all angle parameters between two groups before and after operation (All P< 0.05). Besides, the TISA750 in superior quadrant, ACD and ACV were significantly smaller in the group of SAC than those in the group of NAC 3 months after operation (P = 0.041, 0.001 and 0.002, respectively). Conclusions: Cataract surgery can deepen anterior chamber and increase the width of anterior chamber angle in Chinese subjects, but the ACD and ACV in patients with shallow anterior chamber and narrow angle have not reached the normal level, presumably because the iris root of SAC group inserted more anteriorly than that of NAC group. Phacoemulsification may not completely eliminate the risk of glaucoma in NAC group of people after surgery.

scholarly journals Assessment of anterior chamber configuration changes after phacoemulsification with swept-source optical coherence tomography

2019 ◽  
Author(s):  
Man Hu ◽  
Qian Zheng ◽  
Zhangliang Li ◽  
Pingjun Chang ◽  
Yun-e Zhao
Keyword(s):  
Optical Coherence Tomography ◽  
Cataract Surgery ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Optical Coherence ◽  
Swept Source ◽  
Narrow Angle ◽  
Age Related ◽  
Shallow Anterior Chamber

Abstract Background To assess the changes of anterior chamber angle in patients with shallow anterior chamber and normal anterior chamber after phacoemulsification and intraocular lens implantation (IOL) using anterior segment swept-source optical coherence tomography (AS-SS-OCT). Methods This was a prospective case control study; 60 eyes of 60 patients who underwent cataract surgery. Based on anterior chamber depth (ACD) and gonioscopy findings, the eyes were classified into two groups, shallow anterior chamber group (30 eyes) and normal anterior chamber group (30 eyes). AS-SS-OCT was used to measure ACD and angle parameters angle opening distance (AOD), angle recess area (ARA), trabecular iris space area(TISA), and trabecular iris angle (TIA). Serial changes in each group were measured before and 3 months after phacoemulsification and IOL, and the differences between the two groups were compared. Results All angle parameters including ACD, AOD, ARA, TISA, and TIA in both groups at 3 months after cataract surgery were significantly different from the preoperative values (p<0.01). In addition, we found significant differences of all angle parameters between groups of shallow anterior chamber (SAC) and normal anterior chamber (NAC) (All P< 0.05). Besides, the TISA750 in superior quadrant and anterior chamber volume (ACV) were significantly smaller in the group of SAC than those in the group of NAC (P = 0.041 and 0.002, respectively). Conclusions The parameters of anterior chamber increased significantly in both two groups but not increase to the same extent 3 months after phacoemulsification. Iris thickening may also be one of the narrow angle factors,not just age-related lens thickening.

scholarly journals The changes of anatomic and topographic characteristics of eye anterior segment after uncomplicated cataract phacoemulsification

2013 ◽  
Vol 94 (6) ◽  
pp. 853-858
Author(s):  
A A Ryabtseva ◽  
M P Yugaj ◽  
N S Nikitina
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Ultrasound Biomicroscopy ◽  
Anterior Chamber Angle ◽  
Ciliary Processes ◽  
Lens Implantation ◽  
Topographic Characteristics ◽  
Chamber Angle

Aim. To study the changes of anatomic and topographic characteristics of the eye anterior segment after uncomplicated cataract phacoemulsification using corneal incision with intraocular soft lens implantation. Methods. The data of ultrasound biomicroscopy and noncontact tonometry of 58 eyes (56 patients, 32 females, 24 males aged 54 to 78 years) before and after cataract phacoemulsification were analyzed. Paitents with survived ocular trauma, refractive keratoplasty, glaucoma, uveitis, and surgical complications (incomplete capsulorrhexis, posterior capsule rupture, ciliary zonule disinsertion, corneal burn). Apart from the common examinations (visual acuity testing, tonometry, tonography, eye A- and B-ultrasonography, biomicroscopy), all patients underwent eye ultrasound biomicroscopy. Results. Anterior chamber depth increased from 2.73±0.10 to 4.17±0.06 mm (p ≤0.001). Trabecula-iris distance measured at 500 μm from the scleral spur, increased from 0.38±0.02 to 0.47±0.02 mm (p ≤0.001). Anterior chamber angle increased from 28.69±1.87 to 42.73±1.56 degrees (p ≤0.001), the angle between the iris and the sclera increased from 32.78±1.39 to 41.36±0.84 degrees (p ≤0.001), the angle between the sclera and ciliary processes increased from 39.48±1.29 to 45.30±1.16 degrees (p ≤0.001). Intraocular pressure according to the non-contact tonometry data decreased from 18.16±1.29 to 13.55±0.95 mm Hg (p ≤0.001). Conclusion. Anterior chamber depth, trabecula-iris distance, anterior chamber angle, the angle between sclera and iris and the angle between sclera and ciliary processes increased significantly after phacoemulsification with intraocular lens implantation. Intraocular pressure decreased significantly according to the non-contact tonometry data.

scholarly journals Anterior chamber angle imaging with swept-source optical coherence tomography: comparison between CASIAII and ANTERION

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Poemen Pui-man Chan ◽  
Gilda Lai ◽  
Vivian Chiu ◽  
Anita Chong ◽  
Marco Yu ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Angle Closure ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Scan Pattern ◽  
Chamber Angle

Abstract This study compared the test–retest variabilities and measurement agreement of anterior chamber angle (ACA) dimensions measured by two anterior segment swept-source optical coherence tomography (SS-OCT)—the ANTERION (Heidelberg Engineering, Heidelberg, Germany) and CASIAII (Tomey, Nagoya, Japan). Thirty-eight subjects, 18 patients with primary angle closure and 20 healthy participants with open angles, were included. The mean age was 54.7 ± 15.8 years (range: 26–75 years). One eye of each subject was randomly selected for anterior segment imaging by ANTERION and CASIAII, using the same scan pattern (6 evenly spaced radial scans across the anterior segment for three times) in the same visit. The between- and within-instrument agreement and repeatability coefficients of angle open distance (AOD500), trabecular-iris space area (TISA500), lens vault (LV), scleral spur-scleral spur distance (SSD), anterior chamber depth (ACD), and pupil diameter (PD) were measured. The anterior and posterior boundaries of the cornea, iris, and lens were automatically segmented by the SS-OCT instruments; the scleral spur was manually located by a single masked observer. There were significant differences between ANTERION and CASIAII measurements; the SSD, PD, and ACD were smaller whereas AOD500 and TISA500 were greater in ANTERION compared with CASIAII (P < 0.001). Anterior segment measurements obtained from the two SS-OCT instruments showed strong associations (R2 ranged between 0.866 and 0.998) although the between-instrument agreement was poor; the spans of 95% limits of between-instrument agreement were ≥ 1.5-folds than the within-instrument agreement for either instrument. Whereas both SS-OCT instruments showed low test–retest measurement variabilities, the repeatability coefficients of AOD500, TISA500, ACD, and PD were slightly smaller for CASIAII than ANTERION (P ≤ 0.012).

scholarly journals Changes in Intraocular Pressure and Anterior Chamber Depth after Phacoemulsification in Non-Glaucomatous Patients

2019 ◽  
pp. 1-7
Author(s):  
Mona Abdallah ◽  
Omar M. Ali ◽  
Abd El-Nasser A. Mohammad ◽  
Wael Soliman
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
Open Angle Glaucoma ◽  
Anterior Chamber Depth ◽  
Cataract Extraction ◽  
University Hospital ◽  
Narrow Angle ◽  
Department Of Ophthalmology ◽  
Significant Difference ◽  
Applanation Tonometer

Aims: To evaluate changes in intraocular pressure (IOP) and anterior chamber depth (ACD) after uneventful phacoemulsification with intraocular lens (IOL) implantation. Study Design: Prospective interventional comparative study. Place and Duration of Study: Department of Ophthalmology, Assuit University Hospital, Assuit, Egypt between September 2016 and October 2017. Methodology: 100 Patients with visually significant cataract (39 males (39%) and 61 females (61%). All patients underwent uneventful phacoemulsification. Intraocular pressure and ACD were measured preoperatively by using Goldmann applanation tonometer and Ultrasonography  respectively, and at 1 week, 1 month, and 3 months postoperatively. Results: The postoperative ACD was higher than the preoperative value by 0.26± 0.06 mm at 1 week, 0.45±0.06 mm at 1 month, and 0.59±0.08 mm at 3 months postoperatively (P=.000). P < 0.05 was considered to indicate a statistically significant difference. The IOP at 1 week, 1 month, and 3 months postoperatively was lower than the preoperative value by 1.03±0.3 mmHg, 1.52±0.46 mmHg, and 2.14±0.62 mmHg, respectively (P=.001). Conclusion: This study revealed that there was a decrease in IOP and increase in ACD after cataract extraction by phacoemulsification. Patients with ocular hypertension, open-angle glaucoma, and narrow-angle glaucoma may benefit from cataract extraction.

scholarly journals Evaluation of Anterior Chamber Depth and Anterior Chamber Angle Changing After Phacoemulsification in the Primary Angle Close Suspect Eyes

2019 ◽  
Vol 7 (24) ◽  
pp. 4297-4300
Author(s):  
Anh Tuan Vu ◽  
Van Anh Bui ◽  
Hai Long Vu ◽  
Do Quyet ◽  
Than Van Thai ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens ◽  
Anterior Chamber Depth ◽  
Angle Closure ◽  
Control Group ◽  
Anterior Chamber Angle ◽  
Interventional Study ◽  
Primary Angle Closure ◽  
Shallow Anterior Chamber ◽  
Chamber Angle

BACKGROUND: Phacoemulsification surgery has the ability to deeply alter the segment anterior morphology, especially in eye with shallow anterior chamber (AC), narrow anterior chamber angle (ACA). However, the changes of anterior chamber depth (ACD) and ACA on the close angle suspect eyes after phacoemulsification have not been mentioned in many studies. So, we conduct this research. AIM: To evaluate the alteration in the ACA and ACD after phacoemulsification in the close angle suspect eyes. METHODS: Interventional study with no control group. Subjects were the primary angle closure suspect (PACS) eyes, that were operated by phacoemulsification with intraocular lens (IOL) at Glaucoma Department of VNIO from December 2017 to October 2018. RESULTS: 29 PACS eyes with cataract were operated by phacoemulsification with intraocular lens. After 3 months of monitoring, the average ACD augmented from 2.082 ± 0.244 to 3.673 ± 0.222 mm. AOD500 increase from 0.183 ± 0.088 to 0.388 ± 0.132 μm, AOD750 increased from 0.278 ± 0.105 to 0.576 ± 0.149 μm. The TISA500 enlarged from 0.068 ± 0.033 to 0.140 ± 0.052 mm2, TISA750 enlarged from 0.125 ± 0.052 to 0.256 ± 0.089 mm2 at the third month (p < 0.01). CONCLUSION: Phacoemulsification surgery increases the ACD and enlarged the angle in the PACS eyes.

scholarly journals The Relationship between Anterior Chamber Angle and Intraocular Pressure Early after V4c Implantable Collamer Lens Implantation

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Zongli Hu ◽  
Chunlin Chen ◽  
Min Sun ◽  
Rongdi Yuan ◽  
Jian Ye
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
Linear Correlation ◽  
Control Group ◽  
Anterior Chamber Angle ◽  
Implantable Collamer Lens ◽  
Significant Difference ◽  
The Right ◽  
The Relationship ◽  
Chamber Angle

Purpose. To confirm the relationship between anterior chamber angle (ACA) and intraocular pressure (IOP) early after V4c implantable collamer lens (ICL) implantation. Methods. Patients were assigned to two groups: (1) right eyes (control group) and (2) left eyes (experimental group), with miosis conducted immediately after ICL implantation in the left eyes. IOP, angle opening distance (AOD), trabecular-iris angle (TIA), and pupil diameter (PD) were compared between two groups at postoperative hours 1, 2, and 24. The relationship between ACA, PD, and IOP was analyzed by multiple linear regression. Result. Thirty-six eyes of 18 patients were enrolled. The prevalence of ocular hypertension (OHT, defined as IOP ≥ 21 mmHg) was 61.11% and 16.67% in the right and left eyes, respectively, (χ2 = 7.481, p=0.006). At postoperative hours 1 and 2, IOP and PD were significantly higher p<0.001 in the right eyes, and TIA and AOD were significantly lower p<0.05 in the right eyes than in the left eyes. There was no significant difference at 24 h postoperative in these parameters. After the right eye ICL implantation, the changes of AOD 500 and PD were both linearly correlated with postoperative IOP change (β = −23.707 and 1.731, respectively; p = 0.013 and 0.002, respectively). Conclusion. The ACA was significantly narrowed immediately after V4c ICL implantation. There was a negative linear correlation between ACA and early IOP and a positive linear correlation between PD and early IOP. We recommend the use of intracameral miotics immediately after V4c ICL implantation to reduce the incidence of IOP spikes.

scholarly journals Intraocular Pressure Reduction after Femtolaser Assisted Cataract Surgery and Its Association with the Use of Ultrasound

Medicina ◽  
2021 ◽  
Vol 57 (5) ◽  
pp. 437
Author(s):  
Hana Abouzeid ◽  
Walter Ferrini ◽  
Murielle Bochud
Keyword(s):  
Intraocular Pressure ◽  
Linear Regression ◽  
Cataract Surgery ◽  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
Multiple Linear Regression Model ◽  
Study Data ◽  
Department Of Ophthalmology ◽  
Duration Of Surgery ◽  
Ocular Pressure

Background and Objectives: To quantify the change in intraocular pressure (IOP) after phacoemulsification in patients having undergone femtolaser assisted cataract surgery (FLACS), and study the influence of the use of ultrasound on this change. Setting: Jules-Gonin Eye Hospital, University Department of Ophthalmology, Lausanne, Switzerland. Materials and Methods: Interventional study. Methods: All consecutive cases operated with FLACS and with complete data for the studied parameters were selected for inclusion in the study. Data had been prospectively collected and was analysed retrospectively. Linear regression was performed to explore the association of change in IOP with time of measure, ultrasound use, sex, age, and duration of surgery. Results: There was a mean decrease in intraocular pressure of 2.5 mmHg (CI 95% −3.6; −1.4, p < 0.001) postoperatively. No association between the change in intraocular pressure and ultrasound time or effective phaco time was observed when the data were analyzed one at a time or in a multiple linear regression model. There was no association with sex, age, nuclear density, presence of pseudoexfoliation, duration of surgery, and time of ocular pressure measurement. Eyes with preoperative IOP ≥ 21 mmHg had a more significant IOP reduction after surgery (p < 0.0001) as did eyes with an anterior chamber depth <2.5 mm (p = 0.01). Conclusion: There was a decrease in intraocular pressure six months after FLACS in our study similar to that in the published literature for standard phacoemulsification. The use of ultrasound may not influence the size of the decrease, whereas the preoperative IOP and anterior chamber depth do. FLACS may be as valuable as standard phacoemulsification for cases where IOP reduction is needed postoperatively.

scholarly journals Evaluation of Anterior Chamber Depth in 28,709 Adult Cataract Patients in China using Swept-Source Optical Biometry

2021 ◽  
Author(s):  
Qiong Lei ◽  
Haixia Tu ◽  
Xi Feng ◽  
Yong Wang
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Axial Length ◽  
Corneal Thickness ◽  
Anterior Chamber Depth ◽  
Multivariate Regression Analysis ◽  
Swept Source ◽  
Mean Values ◽  
The Mean ◽  
Cataract Patients

Abstract Background: To create an anterior chamber depth (ACD) regression model for adult cataract surgery candidates from China, and to evaluate the distribution of their ocular biometric parameters.Methods: The ocular biometric records of 28,709 right eyes of cataract surgery candidates who were treated at Aier Eye Hospitals in nine cities from 2018 to 2019 were retrospectively analyzed. All measurements were taken with IOLMaster 700. We included patients who were at least 40 years old and were diagnosed with cataract.Results: The mean age of the patients was 68.6 ± 11.0 years. The mean values recorded were as follows: axial length (AL), 24.17 ± 2.47 mm; mean keratometry (Km) value, 44.09 ± 3.25 D; corneal astigmatism (CA), 1.06 ± 0.98 D; ACD, 3.02 ± 0.45 mm; lens thickness (LT), 4.52 ± 0.45 mm; central corneal thickness (CCT), 0.534 ± 0.04 mm; and white to white (WTW) corneal diameter, 11.64 ± 0.46 mm. The proportion of patients with long axial length (AL >25 mm) decreased with age. ACD, LT, AL, Km, WTW, and age were correlated. In the multivariate regression analysis of ACD, which included LT, AL, WTW, sex, Km, CCT, and age, there was a reasonable prediction with adjusted R2 = 0.629.Conclusions: The results show that high myopes are inclined to schedule cataract surgery at a younger age. LT and AL were found to be important factors that affect ACD. This study provides reference data for cataract patients from China.

Sign in / Sign up

Export Citation Format

Share Document