scholarly journals Ultrasound Biomicroscopy Diagnosis Analysis and Fine Care of Anterior Segment Injury of Traumatic Anterior Chamber Based on Intelligent Virtual Reality Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Xiaoli Li
Keyword(s):  
Virtual Reality ◽  
Anterior Chamber ◽  
Ciliary Body ◽  
Anterior Segment ◽  
Ultrasound Biomicroscopy ◽  
The Body ◽  
Ocular Injury ◽  
Virtual Reality Technology ◽  
Ocular Ultrasound ◽  
Eye Damage

The front part of the eye is exposed to the surface of the body, making it susceptible to injury. Blunt eye injuries often destroy the tissue structure in the anterior part of the eye. Often there is detachment of the iris root, separation of the ciliary body, the angle of retraction of the chamber, and complete dislocation or subluxation of the lens. Ordinary ocular ultrasound can penetrate into opaque tissue, but because of its low resolution, it can only show its outline, which is still very small for doctors in assisting diagnosis. Ultrasonic biomicroscopy is a very real-time analysis, will not be affected by the refraction space, and has great application value for ocular trauma. Based on this, this article proposes the ultrasound biomicroscope diagnosis analysis and fine nursing research of traumatic anterior chamber injury based on intelligent virtual reality technology. This article describes literature methods, experimental analysis methods, and other methods, in-depth study of the causes of traumatic anterior injuries, ultrasound biomicroscopy, and other theoretical knowledge, ultrasound biomicroscopy and microcontrol experiments for traumatic anterior injury design, and finally the causes of eye damage. This study compares the pairing results of ultrasound biomicroscopy biological measurements, analyzes the relationship between anterior bleeding level and anterior ocular injury, and analyzes the outcome and extent of service ophthalmology. The angle retreat accounted for 52.17% in grade I, 72.22% in grade II, and 60% in grade III. Anterior bleeding can cause single or complex iris root detachment, iris root detachment, ciliary body detachment, and angular leakage. The more the bleeding, the more serious the eye damage.

scholarly journals Ultrasound biomicroscopy in diagnosis of anterior segment pathology

2009 ◽  
Vol 137 (3-4) ◽  
pp. 185-188
Author(s):  
Ivan Stefanovic ◽  
Bojana Dacic-Krnjaja ◽  
Smiljka Djuric
Keyword(s):  
Anterior Chamber ◽  
Ciliary Body ◽  
Diagnostic Procedure ◽  
Anterior Segment ◽  
Ultrasound Biomicroscopy ◽  
Eye Diseases ◽  
Clinical Images ◽  
Clinical Centre ◽  
The Difference ◽  
Chamber Angle

Introduction. Ultrasound biomicroscopy (UBM) is a non-invasive diagnostic procedure, developed in order to achieve better visualization of the anterior segment of the eye. The first clinical images were made in March 1990. The use of UBM at the Institute for Eye Diseases, Clinical Centre of Serbia, began in February 2007. Outline of Cases. Due to a drop in visual acuity, the first patient was sent to the Institute for Eye Diseases, Clinical Centre of Serbia. The existence of the ciliary body tumour was suspected, so she underwent a UBM diagnostic procedure. UBM showed fibrin in the anterior chamber of the eye, occlusion of the pupil, and the absence of tumour. The second patient had a part of the chamber angle filled with solid lesion. UBM showed a solid tumour lesion filling the chamber angle in the lower part of the anterior chamber. The origin of the tumour was the ciliary body rather than the choroid which was shown by the B scan ultrasound. Lipodermoid was found by clinical examination of the third patient. He underwent UBM in order to exclude the involvement of the sclera under the lesion. UBM visualized a subconjunctival lesion lying on the sclera, reaching the limbus of the cornea. The difference in ultrasound reflection of the two tissues helped us to confirm that the sclera was not involved. Our fourth patient underwent an antiglaucomatous procedure, and the assessment of the chamber angle opening was the reason for the UBM examination. Parameters measured in the lower quadrants (6 o'clock) that we managed to obtain were the following: AOD (250 ?m) - 180 ?m, AOD (500 ?m) - 400 ?m, TIA - 34.39 deg., ARA - 0.25 mm2. Comparing them to normal values, we came to the conclusion that the chamber angle was open in the lower part of the anterior chamber. Conclusion. Ultrasound biomicroscopy gives us plenty of useful information when it comes to diagnosing the anterior chamber pathology.

scholarly journals Assessment of Anterior Chamber by Ultrasound Biomicroscopy and Anterior Segment Optical Coherence Tomography in Patients with Inflammatory Glaucoma

2019 ◽  
Vol 47 (12) ◽  
pp. 5950-5956 ◽  
Author(s):  
Yiyong Qian ◽  
Lin Liu ◽  
Yuehui Shi ◽  
Minli Wang ◽  
Min Li ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Ciliary Body ◽  
Imaging Techniques ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Ultrasound Biomicroscopy ◽  
Optical Coherence ◽  
Pars Plana

Objective To investigate the clinical indications of ultrasound biomicroscopy (UBM) and anterior segment optical coherence tomography (AS-OCT) in eyes with inflammatory glaucoma. Methods Sixteen patients (16 eyes) with inflammatory glaucoma were analysed retrospectively. All of the subjects underwent UBM and AS-OCT scans, measuring the following parameters: central corneal thickness (CCT), central anterior chamber depth (ACD), angle-opening distance (AOD500), and trabecular-iris angle (TIA500) in four quadrants. Results Both the UBM and AS-OCT generated detailed, high-resolution images of the anterior segments of the eyes with inflammatory glaucoma. Moreover, the UBM and AS-OCT exhibited statistically similar measurement results for all of the indices. A Bland–Altman analysis showed a high level of agreement between the two imaging techniques. Additionally, the UBM was able to visualize the ciliary body and pars plana, while the cells and the flare in the anterior chamber appeared more pronounced in the UBM images. Conclusions Both the UBM and AS-OCT are useful tools for anterior segment imaging and taking measurements needed for evaluating inflammatory glaucoma. The AS-OCT has the advantages of being noninvasive and fast, whereas the UBM is presently unparalleled in the visualization of the ciliary body and pars plana.

Pediatric Free-floating Anterior Chamber Cyst of the Iris Pigment Epithelium

2018 ◽  
Vol 1 ◽  
pp. 3
Author(s):  
Joshua S Agranat ◽  
Yoshihiro Yonekawa
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Incidental Finding ◽  
Pigment Epithelium ◽  
Anterior Segment ◽  
Ultrasound Biomicroscopy ◽  
Optical Coherence ◽  
Visual Axis ◽  
Associated Malignancy ◽  
Anatomic Locations

Iris pigment epithelial (IPE) cysts are a subset of iris cysts that arise from the IPE. They are spontaneously erupting epithelial-lined cavities that are found in various anatomic locations of the iris, including the iris pupillary margin, midzone, periphery, and free floating in the vitreous or anterior chamber. We report the case of an asymptomatic 13-year-old boy with an incidental finding of a dislodged anterior chamber cyst diagnosed on routine examination. Modern multimodal image analysis of the cyst including anterior segment optical coherence tomography and ultrasound biomicroscopy (UBM) was utilized to characterize the microstructural anatomy of the lesion. The patient was managed conservatively without complications. Cysts of the IPE typically do not affect vision or ocular health and can be monitored and observed after ascertaining no associated malignancy. Initial diagnostic investigation can include UBM and anterior segment optical coherence tomography. Intervention should be reserved only for cases where the cyst growth leads to obstruction of the visual axis and/or other secondary complications.

scholarly journals Ultrasound Biomicroscopy Detects Peters’ Anomaly and Rieger’s Anomaly in Infants

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Wen-Si Chen ◽  
Dao-Man Xiang ◽  
Lan-Xiang Hu
Keyword(s):  
Anterior Chamber ◽  
Anterior Segment ◽  
Corneal Stroma ◽  
Ultrasound Biomicroscopy ◽  
Type I ◽  
Imaging Features ◽  
Type Iv ◽  
Peters Anomaly ◽  
Flat Anterior Chamber ◽  
Corneal Opacities

Aim. Congenital corneal opacities (CCOs) are the major causes of early visual deprivation in infants. Balloon ultrasound biomicroscopy (UBM) examination is an effective method to diagnose CCO. However, whether it is suitable for children examination is still unknown. Methods. 26 Peters’ anomaly (PA) or Rieger’s anomaly (RA) infants with congenital corneal opacities (CCO) (40 eyes) underwent UBM examinations to study their imaging features. Results. Based on the results, they were divided into UBM Dx-Type I: Descemet’s membrane (DM) and endothelium have heterogenous or discontinuous echo accompanied with corneal stroma echo-enhanced or shallow anterior chamber. Type II: Type I alteration plus abnormal strand of iris extended to the border of the posterior corneal defect or iridocorneal adhesion. Type III: Type I or II combined with the abnormal hyperechoic lens, lens luxation, or keratolenticular adhesion. Type IV: echoes of the DM and the endothelium are continuous, corneal stroma echo is enhanced, and an abnormal strand of peripheral iris extends to the prominent Schwalbe line, accompanied by iris stroma or pupil heteromorphism and a shallow or flat anterior chamber. Conclusion. UBM not only could accurately evaluate the anterior segment abnormalities in CCO infants but also would be a step forward for the management of PA- and RA-associated CCO.

scholarly journals Anterior Segment Imaging – Anterior Chamber Angle Assessment

2010 ◽  
Vol 04 (01) ◽  
pp. 60
Author(s):  
Lisandro Sakata ◽  
Kenji Sakata ◽  
◽  
Keyword(s):  
Anterior Chamber ◽  
Clinical Decision Making ◽  
Anterior Segment ◽  
Clinical Decision ◽  
Ultrasound Biomicroscopy ◽  
Angle Closure Glaucoma ◽  
Angle Closure ◽  
Decision Making Process ◽  
Anterior Chamber Angle ◽  
Anterior Segment Imaging

Angle closure is a visually destructive form of glaucoma that accounts for approximately half of the worldwide blindness caused by this disease. Angle-closure glaucoma tends to occur in anatomically pre-disposed eyes, and the evaluation of the anterior segment morphology may help identify eyes at risk of angle closure. Ultrasound biomicroscopy is one of the devices developed for anterior-segment imaging, and it helped to provide better understanding of the mechanisms of angle closure. Recently, optical coherence tomography (OCT) technology became available for evaluating the anterior segment of the eye, enabling rapid non-contact imaging of the anterior chamber. Interestingly, anterior segment OCT (AS-OCT) technology appears to detect more eyes with angle closure compared with gonioscopy, and further studies should address how anterior segment imaging findings should be incorporated into the clinical decision-making process. In summary, this article reviews most of the previously published papers on the use of anterior segment imaging in angle-closure glaucoma and tackles some relevant points for the interpretation of imaging exams in daily clinical practice.

scholarly journals Assessment of the Capsular Tension Ring Implantation Effect on the IOL Position in the Long Term Period after Uncomplicated Phacoemulsification

2021 ◽  
Vol 18 (4) ◽  
pp. 827-832
Author(s):  
A. N. Kulikov ◽  
E. V. Danilenko ◽  
A. A. Dzilikhov
Keyword(s):  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Vertical Direction ◽  
Ultrasound Biomicroscopy ◽  
Position Change ◽  
Small Shift ◽  
Capsular Tension Ring ◽  
Observation Period

Purpose: To assess the capsular tension ring implantation effect on the IOL position according to different devices in the long term period after uncomplicated phacoemulsification.Patients and methods. The study enrolled 234 patients (273 eyes) with cataract without zonular weakness. A standard examination, optical biometry and Sheimpflug imaging were performed preoperatively. In all cases phacoemulsification with IOL implantation, supported by CTR in 11 % of cases (30 eyes) was performed in 1, 3, and 6 months after surgery autorefractometry, visual acuity, biometry, OCT of anterior segment and ultrasound biomicroscopy were provided.Results. By the 3rd month a small shift of IOL towards the retina was revealed without any refraction changes. In cases with CTR implantation the anterior chamber depth was stable. According to OCT data the angle of IOL tilt in the horizontal meridian gradually decreased, the dynamics was significant from 3 months (p = 0.032). There were no changes in the vertical direction. After CTR implantation IOL position did not significantly change. There was no difference between the groups (p > 0.05) by 6 month. The phenomenon of IOL “deflection” according to OCT data was observed in 20.87 % of cases was in 1 month after operation. In the presence of CTR its frequency decreased to 15.00 %, and in the absence, it increased to 21.63 %. In every fifth case of deformation the measurements did not give us a definite reason to further consider it a “deflection” by 6 months after the operation. In 4.24 % of cases fact of IOL “deflection” was absent at the first month but appeared by the 6 month. There was not any case of CTR implantation among described cases of IOL position change.Conclusion. Fluctuation of anterior chamber depth is observed up to 3 months after uncomplicated phacoemulsification. Changes in IOL tilt angle occur throughout the observation period with a significant decrease in the horizontal plane by 6 month. Implantation of the CTR should stabilize anterior chamber depth, block the IOL tilt and also reduce the percentage of IOL deflection cases in the defined group.

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 Application of intelligent virtual reality technology in Clothing virtual wear and color saturation after COVID-19 epidemic situation

2020 ◽  
Vol 39 (6) ◽  
pp. 8943-8951
Author(s):  
Meng Niu
Keyword(s):  
Virtual Reality ◽  
Characteristic Curve ◽  
Control Point ◽  
The Body ◽  
Transformation Model ◽  
Surface Generation ◽  
Observation System ◽  
Virtual Reality Technology ◽  
Shape Information ◽  
Color Saturation

The COVID-19 epidemic has brought a huge impact to the clothing industry. Because of the inconveniences caused by countermeasures, clothing consumers can’t go to physical stores to try on, so it is urgent to develop a virtual clothing trial system. In addition, online fitting and online shopping gradually become the trend of clothing consumption. Based on virtual reality technology, this paper proposes a virtual clothing fitting system, and studies the color saturation in the process. In this paper, a method of parametric drawing of garment characteristic curve is proposed, and the shape of garment is designed by using control vertices. Based on this, this paper presents four forms of sutured parabola space and their control point solving algorithm. According to the principle of scale method, a three-dimensional coordinate transformation model of feature points is established. The model can calculate the coordinates of each characteristic value point of clothing according to the body shape information provided by customers and the empirical formula of different clothing styles, and then reverse calculate the curve control point. Furthermore, Bezier surface generation method is used to fit the control points. After the surface patches are spliced, the 3D rigid clothing model can be obtained. Experiments show that the method of personalized clothing modeling in this paper is efficient and accurate, which can be further extended to the observation system with larger degree of freedom.

scholarly journals Comparative Study of the Effects of 1% Atropine on the Anterior Segment

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yue Zhou ◽  
Xiao Bo Huang ◽  
Qi Cai ◽  
Jun Jie Li ◽  
Yao Jia Xiong ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Univariate Analysis ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Muscle Thickness ◽  
Ultrasound Biomicroscopy ◽  
Cross Sectional ◽  
Ciliary Process ◽  
Before And After ◽  
Anterior Segment Parameters

Purpose. To investigate the influences of atropine on changes in anterior segment geometry, as measured by ultrasound biomicroscopy in children. Methods. A prospective observational study was performed. Anterior segment parameters were obtained by UBM before and after the instillation of 1% atropine. Univariate linear regression was performed to identify the variables contributing to the changes in the trabecular meshwork-iris angle (TIA). Results. The study included 21 boys and 37 girls with a mean age of 10.79 ± 2.53 years. Anterior chamber parameters including the central anterior chamber depth, TIA, angle opening distance at 500 μm from the scleral spur, iris thickness 750 μm and 1500 μm from the scleral spur, trabecular-ciliary angle (TCA), trabecular-ciliary process distance, sclera-iris angle (SIA), and sclera-ciliary process angle significantly increased after cycloplegia ( P < 0.05 ). In contrast, the lens vault, iris cross-sectional area, and maximum ciliary muscle thickness significantly decreased after cycloplegia. Univariate analysis identified the change in TCA and the change in SIA and the TIA before mydriasis as determinants of the change in TIA. Conclusions. Atropine causes statistically significant changes in various anterior segment parameters in children. The change in anterior chamber angle is associated with the change in TCA and the change in SIA and the TIA before mydriasis.

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