Anterior Segment OCT: Real-Time Intraoperative OCT in Cataract Surgery

2020 ◽  
pp. 191-206
Author(s):  
Boris Malyugin ◽  
Natalia Anisimova
Keyword(s):  
Cataract Surgery ◽  
Real Time ◽  
Anterior Segment ◽  
Anterior Segment Oct ◽  
Intraoperative Oct

scholarly journals Ultrasonography and Ultrasound Biomicroscopy in Ophthalmology

2017 ◽  
pp. 75-80
Keyword(s):  
Cataract Surgery ◽  
Real Time ◽  
Anterior Segment ◽  
Ultrasound Biomicroscopy ◽  
Sound Waves ◽  
Significant Information ◽  
Screening Techniques ◽  
Basic Features ◽  
The Right ◽  
Biometric Information

In this review, we aimed to give information about the basic features of screening techniques and major indications of ultrasonography in ophthalmology. This is a cheap, modern visualization modality and provides images in real-time. Sound waves travel through the eye reflect and these echoes form a picture of the structure of the eye. It also measures the size of the eye. These measurements determine the right power of a lens implant before cataract surgery. In addition realtime images help clinicians to evaluate inside of the eye that cannot be seen directly. Ultrasound biomicroscopy provides diagnostically significant information about anterior segment structures (Anatomic or pathologic structures, crucial biometric information.).

scholarly journals Intraoperative Optical Coherence Tomography Analysis of Clear Corneal Incision: Effect of the Lateral Stromal Hydration

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Jiri Cendelin ◽  
Stepan Rusnak ◽  
Lenka Hecova
Keyword(s):  
Anterior Segment ◽  
Peripheral Part ◽  
Corneal Incision ◽  
Anterior Segment Oct ◽  
Clear Corneal Incision ◽  
Intraoperative Optical Coherence Tomography ◽  
Before And After ◽  
Tomography Analysis ◽  
Intraoperative Oct ◽  
Corneal Incisions

Aim of the Study. The aim of this prospective study was to analyse the effect of lateral stromal hydration on the morphology of clear corneal incision architecture using the microscope integrated anterior segment OCT. Methods. The cohort included 65 clear corneal incisions of 49 patients who underwent cataract surgery. Corneal incisions were recorded using a Leica Proveo 8 microscope with an intraoperative OCT EnFocus™ device continuously during the surgery. Corneal incision morphology before and after lateral stromal hydration was analysed. Results. Good adaptation of the corneal incision before hydration was present in 39 cases (60%), in 16 cases (24.6%), the prominence of posterior lip was present, and, in 10 cases (15.4%), the posterior lip tongue was inverted/retracted into the incision. In 38 cases (58.5%), hydration had no effect on the incision architecture; most often, it was primarily a well-adapted corneal incision (46.2%), less often an incision with posterior lip prominence (10.8%), or tongue inversion into the incision (1.6%) prior to hydration. Hydration worsened the incision architecture in 14 cases (21.5%); most often, it induced/worsened posterior lip prominence (15.4%), less often posterior lip retraction (1.6%), tongue inversion into the incision (1.6%), gap development in the peripheral part of the corneal incision (1.6%), or incomplete opening of the corneal incision (1.6%). In 13 cases (20%), hydration improved the incision architecture, especially in cases with inverted or retracted posterior lip tongue (12.3%), less often in cases with posterior lip prominence (7.7%). Conclusion. Lateral stromal hydration seldom affects the condition of the corneal incision. Still, it can cause both deterioration and improvement of the corneal incision architecture. Intraoperative OCT provides real-time monitoring of corneal incision morphology during hydration procedure.

Anterior Segment OCT Imaging After Femtosecond Laser Cataract Surgery

2013 ◽  
Vol 29 (2) ◽  
pp. 110-112 ◽  
Author(s):  
Zoltan Z. Nagy ◽  
Tamás Filkorn ◽  
Ágnes I. Takács ◽  
Kinga Kránitz ◽  
Tibor Juhasz ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Cataract Surgery ◽  
Anterior Segment ◽  
Anterior Segment Oct ◽  
Oct Imaging

scholarly journals Capsular Blockage Syndrome: Clinical and Anterior Segment Optical Coherence Tomography (OCT) Characteristics

2021 ◽  
Author(s):  
Hsin-Yu Yang ◽  
Sui-Ching Kao ◽  
Chieh-Chih Tsai ◽  
Wei-Kuang Yu
Keyword(s):  
Visual Acuity ◽  
Cataract Surgery ◽  
Low Dose ◽  
Anterior Segment ◽  
Topical Steroid ◽  
Anterior Segment Oct ◽  
Corrected Visual Acuity ◽  
Nd:Yag Laser Capsulotomy ◽  
Significant Difference

Abstract Background:CBS is a rare phenomenon which is found during and after cataract surgery. The mechanism, OCT presentation and clinical characteristics are not well studied. Methods:Document patients with CBS who underwent examination, including refraction, best-corrected visual acuity, slit lamp, anterior segment OCT, and onset after cataract surgery. All patients underwent Nd:YAG laser capsulotomy and were prescribed a low-dose topical steroid for seven days. Post-capsulotomy refraction and visual acuity were recorded.Results:This study included 18 eyes. Patients’ mean age was 80 (range, 54–92). The duration between cataract surgery and CBS diagnosis ranged 15–136 months. According to anterior segment OCT findings, we subcategorized the patients into four types: minimally opaque (n=4, 22%), uniformly turbid (n=7, 39%), focally condensed (n=5, 28%), and diffused sparkling (n=2, 11%). After laser capsulotomy, mean visual acuity improved 0.18 ± 0.09 on the LogMar. A significant difference in absolute refraction changes between the groups was noted— maximum in the focally condensed and minimum in the uniformly turbid types. No patient developed complications or needed further treatment for CBS during mean follow-up of 80 months.Conclusion:High-resolution anterior segment OCT is useful for analyzing pathological changes in the CBS. Our study implies that these four types of CBS presentation indicate various causes of late-CBS formation, as well as distinct clinical presentation and post–laser capsulotomy outcome. In addition, YAG laser capsulotomy is a safe late-CBS treatment modality.

Auswirkungen auf den vorderen Augenabschnitt beim Andocken eines Femtosekundenlasers an das Patienteninterface

2021 ◽  
Vol 1 (5) ◽  
pp. 164-171
Keyword(s):  
Femtosecond Laser ◽  
Cataract Surgery ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Cross Sectional ◽  
Refractive Lens Exchange ◽  
Median Difference ◽  
Refractive Lens ◽  
Intraoperative Oct

Purpose. To compare the intraoperative OCT (optical coherence tomographer) of the femtosecond laser LenSx (Alcon Pharma GmbH, Freiburg) with a Scheimpflug-tomographer and an anterior segment OCT and thus to investigate a possible influence on the anterior segment of the eye when docking the patient’s interface. Material and Methods. A prospective cross-sectional study was conducted with 57 subjects who underwent a planned femtosecond laser-assisted cataract surgery or refractive lens exchange. The eye to be operated on was measured prior to the operation in mydriasis with the Visante OCT (Carl Zeiss Meditec AG, Jena) and the Pentacam AXL (Oculus Optikgeräte GmbH, Wetzlar). During the surgery, images of the anterior segment of the eye were taken by the integrated intraoperative OCT of the laser, which were evaluated afterwards and compared to the values of the other devices. The parameters examined were the internal anterior chamber depth (ACD), nasal and temporal chamber angles, central corneal thickness (CCT) and central lens thickness (LT). Results. The comparison of the intraoperative OCT and the two other devices showed clinically relevant differences in all parameters. The intraoperative OCT showed a 9.19 ± 27.55 μm larger CCT, 0.96 mm (median difference) larger LT, 0.05 mm smaller ACD than the Pentacam AXL and a 21.36 ± 25.50 μm larger CCT, 0.10 mm (median difference) smaller ACD than the Visante OCT. Conclusion. The comparison of the intraoperative OCT with the Visante OCT and the Pentacam AXL shows clinically relevant differences. Changes in the anterior segment of the eye may be due to errors in measurement or docking of the patient’s interface. Keywords. femtosecond laser, OCT, anterior segment of the eye, cataract surgery, refractive lens exchange

scholarly journals Intraoperative Optical Coherence Tomography-Guided Bleb-sparing Epithelial Exchange: A Modified Approach

2021 ◽  
Author(s):  
Dewang Angmo ◽  
Jyoti Shakrawal ◽  
Ramanjit Sihota
Keyword(s):  
Optical Coherence Tomography ◽  
Intraocular Pressure ◽  
Real Time ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Direct Visualization ◽  
Operating Microscope ◽  
Surgical Time ◽  
Intraoperative Optical Coherence Tomography ◽  
Intraoperative Oct

With the advent of newer technologies, real-time anterior segment optical coherence tomography (OCT) integrated with the operating microscope has become possible. We are proposing the technique of bleb revision with greater precision under direct visualization of bleb anatomy and extent of tissue depth allowing better localization and easy maneuvering with lesser complications. In this surgical technique, bleb revision was performed using intraoperative real-time OCT incorporated in OPMI LUMERA 700 microscope. Live surgical and OCT view were seen on a common screen together. A moderately elevated, diffuse functional bleb was noted after three months of bleb revision in both cases with controlled intraocular pressure. Intraoperative OCT-guided bleb-sparing epithelial exchange is an adjunctive technique for bleb repair surgery with an increased precision of surgery which can reduce complications, minimize surgical time and maximize surgical outcome.

scholarly journals Posterior Uveal Effusion after Cataract Surgery

2021 ◽  
pp. 62-67
Author(s):  
Annegret Abaza ◽  
Özlem Dikmetas ◽  
Irmingard Neuhann ◽  
Faik Gelisken
Keyword(s):  
Cataract Surgery ◽  
Corticosteroid Therapy ◽  
Anterior Segment ◽  
Subretinal Fluid ◽  
Posterior Pole ◽  
Functional Improvement ◽  
Long Term Observation ◽  
The Right ◽  
Uveal Effusion

We report a case of posterior uveal effusion (UE) with a long-term follow-up that has occurred following cataract surgery. A 64-year-old woman presented with diminished vision of the right eye (RE) 3 weeks after an uneventful phacoemulsification and intraocular lens implantation. Complete ophthalmic examination including fluorescein angiography (FA), indocyanine green angiography (ICGA), echography and optical coherence tomography (OCT) were performed. Best corrected visual acuity (BCVA) of the RE was 20/50. Anterior segment and intraocular pressure were unremarkable. OCT revealed prominent folds of the choroid and retina, subretinal fluid and darkening of the choroid with reduced visibility of the choroidal vessels and the scleral border. The left eye (LE) was unremarkable. BCVA of the LE was: 20/20. After topical anti-inflammatory and systemic corticosteroid therapy for 5 months, no morphological change of the macula was seen. The patient was observed without any treatment. Forty-three months after the cataract surgery and 38 months after cessation of the corticosteroid therapy, OCT revealed a normal macular morphology and the BCVA improved to 20/25. Even though rare, UE at the posterior pole may occur after modern cataract surgery. OCT examination is a reliable tool in monitoring the macular morphology. Since morphological and functional improvement can be seen in long-term, observation may be considered for some cases of posterior UE with resistance to the therapy.

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