1. 1-24 of 38 1 2 »
    1. Association of Foveal Avascular Zone Enlargement and Diabetic Retinopathy Progression Using Optical Coherence Tomography Angiography

      Association of Foveal Avascular Zone Enlargement and Diabetic Retinopathy Progression Using Optical Coherence Tomography Angiography

      Purpose: The purpose of this article is to evaluate long-term change of the foveal avascular zone (FAZ) area in diabetic eyes using optical coherence tomography angiography (OCTA) (AngioVue, Avanti OCT, Optovue). Methods: A retrospective chart review was conducted of patients who had undergone OCTA fundus examinations with at least 12 months of follow-up. Eyes with previous laser photocoagulation and antivascular endothelial growth factor treatments were excluded. ImageJ software was used to evaluate the FAZ area in the superficial capillary plexus (SCP) and deep capillary plexus (DCP). Results: Forty eyes were analyzed in this study and divided into 3 groups: healthy ...

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    2. Choroidal neovascularization due to choroidal osteoma treated with anti–vascular endothelial growth factor therapy: An optical coherence tomography angiography study

      Choroidal neovascularization due to choroidal osteoma treated with anti–vascular endothelial growth factor therapy: An optical coherence tomography angiography study

      Purpose: To evaluate the response to anti–vascular endothelial growth factor therapy for choroidal neovascularization secondary to choroidal osteoma using optical coherence tomography angiography. Methods: This retrospective study included four eyes of four females with choroidal osteoma complicated by choroidal neovascularization, treated with ranibizumab. All patients underwent full ophthalmologic examination, including ocular ultrasound, retinography, fluorescein angiography, spectral-domain or swept-source optical coherence tomography, and optical coherence tomography angiography. These images were analyzed to measure choroidal osteoma and to study choroidal neovascularization changes after intravitreal anti–vascular endothelial growth factor. Results: In all cases, fluorescein angiography revealed the presence the choroidal neovascularization ...

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    3. Posterior keratoconus—clinical aspects and anterior segment optical coherence tomography findings: A case report

      Posterior keratoconus—clinical aspects and anterior segment optical coherence tomography findings: A case report

      Purpose: To describe a case of Posterior Keratoconus (keratoconus posticus); its clinical condition, corneal, refractive response to intracorneal ring implantation (MyoRing), anterior segment optical coherence tomography findings; and micro incisional cataract surgery outcome. Methods: Case report. Results: The case was studied with high resolution anterior segment optical coherence tomography (OCT), epithelium OCT, corneal topography, and aberrometry. A MyoRing was implanted and after the development of cataract, microincisional cataract surgery was performed. A large hyperopic shift was observed following the ring implantation. Calculation of the intraocular lens showed poor predictability. Conclusions: Posterior keratoconus is a rare corneal congenital disorder characterized by ...

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    4. Macular Changes on Optical Coherence Tomography Before, During, and After Silicone Oil Tamponade for Macula-On Retinal Detachment: A Case Series

      Macular Changes on Optical Coherence Tomography Before, During, and After Silicone Oil Tamponade for Macula-On Retinal Detachment: A Case Series

      Purpose: Assess changes on spectral domain optical coherence tomography (OCT) before, during, and after removal of silicone oil (SO). Methods: Retrospective series of patients who underwent SO tamponade for macula-on rhegmatogenous retinal detachment. OCT scans of the affected eye were taken before, during, and 3 months after SO tamponade. Qualitative assessment of foveal contour and quantitative comparison of OCT parameters (central macular, cube, ganglion cell layer [GCL], and outer retinal thicknesses) were done between 3 time points. Results: Ten eyes of 9 patients were included. Flattening of the foveal contour during SO tamponade was completely reversed after SO removal. Average ...

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    5. Bioabsorbable Drug-Eluting Stent Versus Bare Metal Stent in Iliac Artery Evaluated by Optical Coherence Tomography: An In Vivo Study in Porcine

      Bioabsorbable Drug-Eluting Stent Versus Bare Metal Stent in Iliac Artery Evaluated by Optical Coherence Tomography: An In Vivo Study in Porcine

      Objective: This study aimed to compare, using optical coherence tomography (OCT), the outcomes of bioabsorbable drug-eluting stent with those of bare metal stent (BMS) following implantation in porcine iliac artery. Methods: After the placement of BMS and bioabsorbable drug-eluting stents, we used OCT and digital subtraction angiography to investigate stent appositions, arterial neointima, evagination, and restenosis at 1 and 3 months. Results: At 1 and 3 months after stent implantation, OCT study was performed to investigate 32 stents and 21 788 struts. Thirty-three malapposed struts were found in the bioabsorbable drug-eluting stent groups and 2 were found in BMS groups ...

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    6. Optic coherence tomography appearances of retinal astrocytic hamartoma and systemic features in tuberous sclerosis of Japanese patients

      Optic coherence tomography appearances of retinal astrocytic hamartoma and systemic features in tuberous sclerosis of Japanese patients

      Purpose: To describe the optical coherence tomography findings of retinal astrocytic hamartoma of tuberous sclerosis and to confirm the association between the type of retinal astrocytic hamartoma and systemic manifestations in Japanese patients. Study Design: A retrospective observational case series. Methods: The medical records of 35 patients with tuberous sclerosis who underwent ophthalmological examination were reviewed. The retinal astrocytic hamartomas were classified into four types based on the optical coherence tomography findings, and their association with systemic disease was evaluated. Results: A total of 40 retinal astrocytic hamartomas in 13 eyes of eight patients aged 4–28 years were identified ...

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    7. Optical coherence tomography angiography in myopic choroidal neovascularization after intravitreal ranibizumab

      Optical coherence tomography angiography in myopic choroidal neovascularization after intravitreal ranibizumab

      Purpose: To describe the optical coherence tomography angiography characteristics of myopic patients with choroidal neovascularization secondary to pathologic myopia during ranibizumab therapy. Methods: Nineteen patients were enrolled in this prospective study (13 females, 6 males, mean age 55.25 ± 9.63 years) for a total of 20 eyes examined (14 right eyes, 6 left eyes). Images were analyzed independently by two examiners. Results: Mean follow-up was 5.75 ± 1.88 months, with a mean intravitreal injections of 1.90 ± 0.44. Mean best-corrected visual acuity at baseline was 0.39 ± 0.18 logMAR versus 0.26 ± 0.16 logMAR 6 ...

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    8. Measurement of Normative Foveal Avascular Zone Parameters in Healthy Adults Using Optical Coherence Tomography Angiography

      Measurement of Normative Foveal Avascular Zone Parameters in Healthy Adults Using Optical Coherence Tomography Angiography

      Background and Objective: The purpose of this study was to quantify the geometric dimension of the foveal avascular zone (FAZ) area and its index measurement of morphology as a circle (acircularity index) in healthy participants according to age and sex, using optical coherence tomography angiography (OCTA). Study Design/Materials and Method: This is a cross-sectional descriptive study conducted at LV Prasad Eye Institute, India. Written informed consent was obtained from all participants before the study. Deep range imaging-optical coherence tomography (DRI-OCT; Topcon) was performed on right eyes of all participants in this study. The OCTA scans were analyzed and processed ...

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    9. Evaluation of the lamina cribrosa in patients with diabetes mellitus using enhanced depth imaging spectral-domain optical coherence tomography

      Evaluation of the lamina cribrosa in patients with diabetes mellitus using enhanced depth imaging spectral-domain optical coherence tomography

      Purpose: To compare the lamina cribrosa thickness and anterior lamina cribrosa depth between patients with and without diabetes mellitus and to investigate the effect of metabolic control and duration of diabetes mellitus on lamina cribrosa thickness and anterior lamina cribrosa depth using enhanced depth imaging spectral-domain optical coherence tomography. Methods: A total of 70 patients were enrolled in this cross-sectional study and were divided into the diabetes and control groups. Intraocular pressure, circumpapillary retinal nerve fibre layer thickness, anterior lamina cribrosa depth and lamina cribrosa thickness were compared between the groups. Results: In the control group, the mean intraocular pressure ...

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    10. Optical Coherence Tomography of the Tympanic Membrane and Middle Ear: A Review

      Optical Coherence Tomography of the Tympanic Membrane and Middle Ear: A Review

      Objective To evaluate the recent developments in optical coherence tomography (OCT) for tympanic membrane (TM) and middle ear (ME) imaging and to identify what further development is required for the technology to be integrated into common clinical use. Data Sources PubMed, Embase, Google Scholar, Scopus, and Web of Science. Review Methods A comprehensive literature search was performed for English language articles published from January 1966 to January 2018 with the keywords “tympanic membrane or middle ear,”“optical coherence tomography,” and “imaging.” Conclusion Conventional imaging techniques cannot adequately resolve the microscale features of TM and ME, sometimes necessitating diagnostic exploratory surgery ...

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    11. Optical coherence tomography angiography characterization of acute and late stage Purtscher retinopathy

      Optical coherence tomography angiography characterization of acute and late stage Purtscher retinopathy

      Purpose: To report a case of Purtscher retinopathy imaged with optical coherence tomography angiography. Methods: Case-report. Left eye fundoscopic examination in a 21-year old male after a road traffic accident with chest compression revealed multiple peri-papillary cotton-wool spots and intra- and pre-retinal hemorrhages. A diagnosis of Purtscher retinopathy was assumed. Results: In both the superficial and deep retinal plexuses, acute stage optical coherence tomography angiography identified multiple irregular areas of capillary non-perfusion that extended beyond the clinically visible peri-papillary cotton-wool spots. At 5-month follow-up, despite the clearing of visible cotton-wool spots, there were still permanent areas of irregular capillary non-perfusion ...

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    12. Imaging the Deep Choroidal Vasculature Using Spectral Domain and Swept Source Optical Coherence Tomography Angiography

      Imaging the Deep Choroidal Vasculature Using Spectral Domain and Swept Source Optical Coherence Tomography Angiography

      Purpose: To evaluate the deeper choroidal vasculature in eyes with various ocular disorders using spectral domain (SD) optical coherence tomography angiography (OCTA) and swept source (SS) OCTA. Methods: Patients underwent OCTA imaging with either SD-OCTA (Zeiss Cirrus Angioplex or Optovue AngioVue) or SS-OCTA (Topcon Triton). Retinal pigment epithelium (RPE) integrity, structural visualization of deep choroidal vessels on en face imaging, and OCTA of deep choroidal blood flow signal were analyzed. Choroidal blood flow was deemed present if deeper choroidal vessels appeared bright after appropriate segmentation. Results: Structural visualization of choroidal vessels was feasible in all eyes by en face imaging ...

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    13. Optical coherence tomography angiography in age-related macular degeneration: The game changer

      Optical coherence tomography angiography in age-related macular degeneration: The game changer

      Optical coherence tomography angiography is one of the biggest advances in ophthalmic imaging. It enables a depth-resolved assessment of the retinal and choroidal blood flow, far exceeding the levels of detail commonly obtained with dye angiographies. One of the first applications of optical coherence tomography angiography was in detecting the presence of choroidal neovascularization in age-related macular degeneration and establishing its position in relation to the retinal pigmented epithelium and Bruch’s membrane, and thereby classifying the CNV as type 1, type 2, type 3, or mixed lesions. Optical coherence tomography angiograms, due to the longer wavelength used by optical ...

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    14. Hypotony Maculopathy: A Silent Mimicker of Common Macular Diseases With Nonspecific Optical Coherence Tomography Findings

      Hypotony Maculopathy: A Silent Mimicker of Common Macular Diseases With Nonspecific Optical Coherence Tomography Findings

      Purpose: To highlight the diagnostic challenge of eyes with hypotony maculopathy with concurrent macular diseases and to present optical coherence tomography (OCT) imaging findings in hypotony maculopathy. Methods: Retrospective review of 15 eyes of 12 patients with hypotony maculopathy at a single institution. Results: Low intraocular pressure (IOP) was caused by overfiltration from trabeculectomy in 9 eyes (of 15, 60%), overtreatment with topical aqueous suppressants after trabeculectomy in 3 eyes (of 15, 20%), bleb leak in 1 eye (of 15, 7%), and treatment with topical aqueous suppressants alone in 2 eyes (of 15, 13%). On OCT imaging, 7 eyes (of ...

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    15. Evaluation of ocular perforation during retrobulbar block using high-resolution spectral domain–optical coherence tomography and optical coherence tomography angiography

      Evaluation of ocular perforation during retrobulbar block using high-resolution spectral domain–optical coherence tomography and optical coherence tomography angiography

      Introduction: This article reports a case of ocular perforation during a retrobulbar block in a patient who underwent scleral buckle for retinal detachment. Methods: Sterile air was immediately injected into the vitreous cavity to restore intraocular pressure and the scleral buckle operation was quickly finished. One week later, a laser retinopexy was performed on the two retinal holes that were outside the foveal area. After 6 months, spectral domain–optical coherence tomography and optical coherence tomography angiography were performed on the perforated wall centered on the exit hole area. Results: The visual acuity was maintained 20/20 and the retina ...

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    16. Evaluation of Shape of Foveal Avascular Zone by Optical Coherence Tomography Angiography in Eyes With Branch Retinal Vein Occlusion

      Evaluation of Shape of Foveal Avascular Zone by Optical Coherence Tomography Angiography in Eyes With Branch Retinal Vein Occlusion

      Purpose: To determine the relationship between morphological parameters of the foveal avascular zone (FAZ) in the optical coherence tomography angiographic (OCTA) images and the best-corrected visual acuity (BCVA) in branch retinal vein occlusion (BRVO). Methods: This was a retrospective cross-sectional study. Eyes with BRVO without apparent macular edema were studied. The superficial FAZ in 3 × 3 mm OCTA images were delineated manually. The size and shape, the circularity and axial ratio, of the FAZ were determined, and the values were compared to that of the controls. The correlation of these parameters with the BCVA was analyzed. Results: The mean FAZ ...

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      Mentions: Taiji Sakamoto
    17. Optical coherence tomography angiography and choroidal neovascularization in multifocal choroiditis: A descriptive study

      Optical coherence tomography angiography and choroidal neovascularization in multifocal choroiditis: A descriptive study

      Optical coherence tomography angiography and choroidal neovascularization in multifocal choroiditis: A descriptive study Show all authors Cyril Dutheil , Jean-François Korobelnik , Marie-Noëlle Delyfer , ... First Published March 23, 2018 Research Article Download PDF Article information Abstract Purpose: To analyze the ability of optical coherence tomography angiography to identify choroidal neovascularization in multifocal choroiditis and to describe active and inactive choroidal neovascularization findings. Methods: Retrospective study of consecutive patients with multifocal choroiditis and choroidal neovascularization examined between January and November 2016. In addition to usual exams, optical coherence tomography angiography (AngioPlex™ CIRRUS™ HD-OCT model 5000; Carl Zeiss Meditec, Inc., Dublin, CA ...

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    18. Dark and white lesions observed in central serous chorioretinopathy on optical coherence tomography angiography

      Dark and white lesions observed in central serous chorioretinopathy on optical coherence tomography angiography

      Dark and white lesions observed in central serous chorioretinopathy on optical coherence tomography angiography Show all authors Flore De Bats , Pierre-Loïc Cornut , Benjamin Wolff , ... First Published March 19, 2018 Research Article Download PDF Article information Abstract Purpose: To describe abnormal dark (hyposignal) and white (hypersignal) lesions observed on optical coherence tomography angiography in central serous chorioretinopathy. Methods: Prospective, multicenter, and descriptive study including patients with active or quiescent central serous chorioretinopathy. All patients had undergone a complete ophthalmic examination. Results: Abnormal dark lesions were detected as “dark spots” and “dark areas” on optical coherence tomography angiography. A “dark spot ...

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    19. Clinical applications of optical coherence tomography angiography: What we have learnt in the first 3 years

      Clinical applications of optical coherence tomography angiography: What we have learnt in the first 3 years

      A review of the literature from 2014 to 2016 was conducted, focusing on the results of optical coherence tomography angiography in different chorioretinal diseases. In only 3 years, optical coherence tomography angiography has been shown to be an effective tool for diagnosing choroidal neovascularization complicating age-related macular degeneration, pathologic myopia, and inflammatory conditions. The technique has sometimes been considered superior to conventional multimodal imaging, for example, in choroidal neovascularization associated with chronic central serous chorioretinopathy or multifocal choroiditis. In retinal vascular diseases, optical coherence tomography angiography has helped to understand the condition described as paracentral acute middle maculopathy and has ...

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    20. Spectral-Domain Optical Coherence Tomography Associations of Neovascular Conversion in Age-Related Macular Degeneration

      Spectral-Domain Optical Coherence Tomography Associations of Neovascular Conversion in Age-Related Macular Degeneration

      Purpose: To identify spectral-domain optical coherence tomography (SD-OCT) features associated with exudative conversion in fellow eyes of patients treated for neovascular age-related macular degeneration (nAMD) in their first eye. Methods: Retrospective observational study. Spectral-domain optical coherence tomography images of converting fellow eyes (study eyes) from 83 patients with nAMD were compared to fellow eyes of age- and sex-matched patients with nAMD who did not convert (control eyes). Parameters related to drusen, pigment epithelium detachment, hyperreflective foci (HRF), retinal pigment epithelium atrophy, small cystic cavities, and vitreoretinal interface were graded. Longitudinal analysis in study eyes and cross-sectional comparison with control eyes ...

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    21. Optical Coherence Tomography Imaging After Surgical Closure of Pediatric Traumatic Macular Holes

      Optical Coherence Tomography Imaging After Surgical Closure of Pediatric Traumatic Macular Holes

      Purpose: To date, little attention has been directed to retinal photoreceptor migration after traumatic macular hole surgical repair in the pediatric population. The purpose of this study was to evaluate optical coherence tomography (OCT) findings in the foveae of pediatric patients with history of traumatic macular hole surgical repair. Methods: Retrospective case series of 3 eyes in 3 pediatric patients with traumatic macular hole surgical repair. Spectral domain OCT images were obtained pre- and postoperatively. Results: We report 3 cases of restoration of the ellipsoid zone with good visual acuity outcomes following macular hole closure. Conclusion: Optical coherence tomography findings ...

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    22. Optical coherence tomography angiography indicates associations of the retinal vascular network and disease activity in multiple sclerosis

      Optical coherence tomography angiography indicates associations of the retinal vascular network and disease activity in multiple sclerosis

      Background: Patients with multiple sclerosis (MS) and clinically isolated syndrome (CIS) may show alterations of retinal layer architecture as measured by optical coherence tomography. Little is known about changes in the retinal vascular network during MS. Objective: To characterize retinal vessel structures in patients with MS and CIS and to test for associations with MS disease activity. Method: In all, 42 patients with MS or CIS and 50 healthy controls underwent retinal optical coherence tomography angiography (OCT-A) with analysis of the superficial and deep vascular plexuses and the choriocapillaries. We tested OCT-A parameters for associations with retinal layer volumes, history ...

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    1-24 of 38 1 2 »
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