1. Articles from Kaweh Mansouri

    1-22 of 22
    1. Changes in peripapillary and macular vascular density after laser selective trabeculoplasty: an optical coherence tomography angiography study

      Changes in peripapillary and macular vascular density after laser selective trabeculoplasty: an optical coherence tomography angiography study

      Objectives: To determine the effect of laser trabeculoplasty on peripapillary retinal nerve fibre layer thickness (RNFL), fovea avascular zone (FAZ), peripapillary and macular vessel density (VD) in glaucoma using with optical coherence tomography angiography (OCT-A). Methods: This was a prospective observational study performed at the Glaucoma Research Centre, Montchoisi Clinic, Lausanne, Switzerland. Thirty-seven eyes with primary open-angle glaucoma from 21 patients were included. Optical coherence tomography angiography (OCT-A) scans were performed before laser trabeculoplasty and at 2 and 6 months after the procedure. AngioVue AngioAnalytic (Optovue Inc, Fremont, CA, USA) software was used to analyse the RNFL, FAZ, peripapillary and ...

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    2. Optical Coherence Tomography Angiography and Visual Field Progression in Primary Angle Closure Glaucoma

      Optical Coherence Tomography Angiography and Visual Field Progression in Primary Angle Closure Glaucoma

      Precis: Lower whole enface disc (coefficient: 0.02, P =0.03) and macular vessel densities (coefficient: 0.04, P =0.02) on OCT angiography were significantly associated with faster rate of mean deviation decline. Purpose: To evaluate the association between optical coherence tomography angiography (OCTA) features and prior visual field (VF) progression in primary angle closure glaucoma (PACG). Methods: In a cross-sectional study, 46 eyes of 31 PACG patients with 5 reliable VF examinations performed over ≥3 years of follow-up underwent OCTA imaging. Effect of clinical (age, gender, number of anti-glaucoma medications, mean and SD of intraocular pressure during follow-up ...

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    3. Referenced scans improve the repeatability of optical coherence tomography angiography measurements in normal and glaucoma eyes

      Referenced scans improve the repeatability of optical coherence tomography angiography measurements in normal and glaucoma eyes

      Aim To compare the repeatability of peripapillary perfusion density and flux index measurements on referenced and non-referenced optical microangiography (OMAG) scans in normal, glaucoma suspect and glaucoma eyes. Methods In a cross-sectional study, 48 eyes (33 subjects) underwent three repeat, non-referenced peripapillary OMAG scans in the same session and 43 eyes (25 subjects) underwent three referenced peripapillary OMAG scans. In the referenced scan group, repeat scans (second and the third scan) were acquired exactly on the baseline (first) scan using the ‘track to prior scan’ option on the device. Repeatability estimates of the mean and four-sector (temporal, superior, nasal and ...

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    4. Iridocorneal Angle Assessment After Laser Iridotomy with Swept-source Optical Coherence Tomography

      Iridocorneal Angle Assessment After Laser Iridotomy with Swept-source Optical Coherence Tomography

      Aim: To investigate the reliability of anterior chamber angle (ACA) measurements in narrow angles and assess the effect of laser peripheral iridotomy (LPI) on these measurements using novel swept-source optical coherence tomography (SS-OCT) technology. Methods: In this prospective observational study, patients with gonioscopically narrow angles were enrolled and scheduled for prophylactic LPI. Twelve ACA sections were obtained in each eye using SS-OCT (ANTERION, Heidelberg Engineering, Germany) before and after Nd:YAG LPI. A built-in algorithm calculated ACA measurements after manual identification of the scleral spur and ACA recess. Eight ACA parameters were evaluated: ACA (ACA 500, ACA 750); Scleral Spur ...

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    5. Repeatability and comparability of peripapillary vessel density measurements of high-density and non-high-density optical coherence tomography angiography scans in normal and glaucoma eyes

      Repeatability and comparability of peripapillary vessel density measurements of high-density and non-high-density optical coherence tomography angiography scans in normal and glaucoma eyes

      Aims To compare the peripapillary vessel density (VD) measurements of high-density (HD) and non-HD optical coherence tomography angiography (OCTA) scans in normal and glaucoma eyes, and to evaluate the intrasession repeatability of VD measurements of HD scans. Methods In a cross-sectional study, 46 normal (33 subjects) and 89 glaucoma (64 patients) eyes underwent 3 HD and 1 non-HD optic nerve head OCTA scans in the same session. Agreement in VD measurements between HD and non-HD scans was assessed using Bland and Altman analysis. Repeatability of the VD measurements of HD scans was assessed using within-subject coefficient of repeatability (CRw) and ...

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    6. Diagnostic Abilities of the Optical Microangiography Parameters of the 3×3 mm and 6×6 mm Macular Scans in Glaucoma

      Diagnostic Abilities of the Optical Microangiography Parameters of the 3×3 mm and 6×6 mm Macular Scans in Glaucoma

      Purpose: To evaluate the diagnostic abilities of macular vessel length and perfusion densities measured with optical microangiography (OMAG) over a 3×3 mm and a 6×6 mm region, and to compare these with macular ganglion cell-inner plexiform layer (GCIPL) thickness in eyes with primary open-angle glaucoma (POAG). Methods: In a cross-sectional study, 96 eyes of 57 control subjects and 88 eyes of 57 POAG patients underwent macular imaging with optical coherence tomography. Area under receiver operating characteristic curves (AUC) and sensitivities at 90% specificity of OMAG and GCIPL parameters were evaluated. Results: Most OMAG parameters of the 3×3 ...

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    7. Relationship of Macular Thickness and Function to Optical Microangiography Measurements in Glaucoma

      Relationship of Macular Thickness and Function to Optical Microangiography Measurements in Glaucoma

      Purpose: The purpose of this article was to evaluate the relationship between macular optical microangiography (OMAG), ganglion cell-inner plexiform layer (GCIPL) thickness, and visual sensitivity measurements of different macular sectors in primary open-angle glaucoma. Methods: In a cross-sectional study, 39 eyes of 26 primary open-angle glaucoma patients underwent optical coherence tomography imaging and 10-2 visual field examination of the macula in the same session. Linear regression models were used to evaluate the relationships between OMAG, GCIPL thickness, and visual sensitivity measurements in different macular sectors. Strength of relationship was reported as coefficient of determination ( R 2 ). Results: R 2 values ...

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    8. Diurnal Variations of Peripapillary and Macular Vessel Density in Glaucomatous Eyes Using Ocular Coherence Tomography Angiography

      Diurnal Variations of Peripapillary and Macular Vessel Density in Glaucomatous Eyes Using Ocular Coherence Tomography Angiography

      Purpose: To investigate the diurnal variation in peripapillary and macular vessel density (VD) measurements using optical coherence tomography angiography (OCT-A) and its correlation to intraocular pressure (IOP) changes in glaucoma patients. Methods: Prospective, observational cross-sectional study including 37 patients (74 eyes; age, 63.8±12.9▒y) with open angle glaucoma. OCT-A imaging and IOP measurements were performed at 08:00, 11:00, 14:00, and 16:00 on a single day. At each time-point, two scan protocols were used to generate 3-dimensional en-face OCT angiograms: 4.5×4.5-mm scan centered on optic nerve head and 6×6-mm scan ...

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    9. Optical Coherence Tomography Angiography Description of Ocular Decompression Retinopathy after Deep Sclerectomy in Traumatic Glaucoma

      Optical Coherence Tomography Angiography Description of Ocular Decompression Retinopathy after Deep Sclerectomy in Traumatic Glaucoma

      Purpose: To present a case of ocular decompression retinopathy (ODR) occurring after uncomplicated deep sclerectomy with Mitomycin C using optical coherence tomography angiography (OCTA). Patient and Method: Single case report. Results: A 55-year-old man with traumatic glaucoma in the right eye complained of blurred vision. Visual acuity was 20/25 and intraocular pressure (IOP) was 50▒mm Hg. Deep sclerectomy with Mitomycin C was performed. On the first postoperative day, best corrected visual acuity (BCVA) was light perception and IOP was 6▒mm Hg. At 3 months follow-up, BCVA was 20/40 and IOP was 14▒mm Hg. Fundoscopy showed ...

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      Mentions: Optovue
    10. Optical Coherence Tomography Angiography Vessel Density Measurements in Eyes With Primary Open-Angle Glaucoma and Disc Hemorrhage

      Optical Coherence Tomography Angiography Vessel Density Measurements in Eyes With Primary Open-Angle Glaucoma and Disc Hemorrhage

      Purpose: To compare the vessel density measurements of optic nerve head, peripapillary and macular regions in severity-matched primary open-angle glaucoma (POAG) eyes with and without disc hemorrhage (DH) using optical coherence tomography (OCT) angiography, and to compare their diagnostic abilities with that of the rim area, retinal nerve fiber layer and the ganglion cell complex thickness measurements on OCT. Methods: In a cross-sectional study, 66 eyes of 46 control subjects, 34 eyes of 33 POAG patients with DH (median mean deviation=−3.7 dB) and 63 eyes of 43 POAG patients without DH (median mean deviation=−3.8 dB) underwent ...

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    11. Reproducibility of Optical Coherence Tomography Angiography Macular and Optic Nerve Head Vascular Density in Glaucoma and Healthy Eyes

      Reproducibility of Optical Coherence Tomography Angiography Macular and Optic Nerve Head Vascular Density in Glaucoma and Healthy Eyes

      Purpose: Optical coherence tomography angiography (OCT-A) is a non-invasive technology that allows visualization of retinal blood vessels. It is important to determine reproducibility of measurements as low precision can impair its diagnostic capabilities. The purpose of this study is to determine intra-visit and inter-visit reproducibility of optic nerve head (ONH) and macular vessel density measurements with OCT-A. Patients and Methods: Fifteen healthy volunteers and fourteen glaucoma patients completed two OCT-A (AngioVue; Optovue Inc.) scanning sessions on each of two separate days to assess intra-visit and inter-visit reproducibility. A series of ONH and macula scans were acquired at each session. Vessel ...

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    12. Optical Coherence Tomography Angiography Vessel Density Measurements in Eyes with Primary Open Angle Glaucoma and Disc Hemorrhage

      Optical Coherence Tomography Angiography Vessel Density Measurements in Eyes with Primary Open Angle Glaucoma and Disc Hemorrhage

      Purpose: To compare the vessel density measurements of optic nerve head (ONH), peripapillary and macular regions in severity-matched primary open angle glaucoma (POAG) eyes with and without disc hemorrhage (DH) using optical coherence tomography (OCT) angiography (OCTA), and to compare their diagnostic abilities with that of the rim area, retinal nerve fiber layer and the ganglion cell complex thickness measurements on OCT. Methods: In a cross-sectional study, 66 eyes of 46 control subjects, 34 eyes of 33 POAG patients with DH (median mean deviation, MD: -3.7 dB) and 63 eyes of 43 POAG patients without DH (median MD: -3 ...

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    13. Optic Nerve Head Drusen: Imaging Using Optical Coherence Tomography Angiography

      Optic Nerve Head Drusen: Imaging Using Optical Coherence Tomography Angiography

      Purpose: To describe findings and utility of optical coherence tomography angiography (OCTA) in optic nerve head drusen (ONHD). Observations: A 57-year-old white man presented with a decrease in contrast sensitivity of the inferior visual field in both eyes. Clinical examination, visual fields, optical coherence tomography, fundus autofluorescence and OCTA revealed ONHD bilaterally. A focal decrease in vessel density within the localization of ONHD in both eyes was demonstrated suggesting a connection between those findings. Conclusions and Importance: This is the first report in which peripapillary vessel density is analyzed using OCTA technology for this entity. OCTA could confirm the diagnosis ...

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    14. Relationship of Optic Nerve Structure and Function to Peripapillary Vessel Density Measurements of Optical Coherence Tomography Angiography in Glaucoma

      Relationship of Optic Nerve Structure and Function to Peripapillary Vessel Density Measurements of Optical Coherence Tomography Angiography in Glaucoma

      Purpose: To evaluate the sectoral and global structure-structure (vessel density-retinal nerve fiber layer thickness) and structure-function (vessel density-visual sensitivity loss) relationships of peripapillary vessel density measurements on optical coherence tomography angiography in primary open-angle glaucoma and to determine if fractional polynomial (FP) models characterize the relationships better than linear models. Materials and Methods: In a cross-sectional study, structure-structure and structure-function relationships of peripapillary vessel densities were determined in 227 eyes of 143 subjects (63 control and 164 primary open-angle glaucoma eyes) who had undergone standard automated perimetry and optical coherence tomography testing within 6 months of each other, using linear ...

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    15. A comparison of the diagnostic ability of vessel density and structural measurements of optical coherence tomography in primary open angle glaucoma

      A comparison of the diagnostic ability of vessel density and structural measurements of optical coherence tomography in primary open angle glaucoma

      Purpose To compare the diagnostic abilities of vessel density measurements of the optic nerve head (ONH), peripapillary and macular regions on optical coherence tomography (OCT) angiography in eyes with primary open angle glaucoma (POAG) with that of the ONH rim area, peripapillary retinal nerve fiber layer (RNFL) thickness and the macular ganglion cell complex (GCC) thickness measurements. Methods In a cross sectional study, 78 eyes of 50 control subjects and 117 eyes of 67 POAG patients underwent vessel density and structural measurements with spectral domain OCT. POAG was diagnosed based on the masked evaluation of optic disc stereo photographs. Area ...

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    16. Vessel density and structural measurements of optical coherence tomography in primary angle closure and primary angle closure glaucoma

      Vessel density and structural measurements of optical coherence tomography in primary angle closure and primary angle closure glaucoma

      Purpose To evaluate the vessel density measurements of the optic nerve head (ONH), peripapillary and macular regions on optical coherence tomography (OCT) angiography in eyes with primary angle closure (PAC) and primary angle closure glaucoma (PACG), and to compare their diagnostic abilities with the ONH rim area, peripapillary retinal nerve fiber layer (RNFL) thickness and the macular ganglion cell complex (GCC) thickness measurements on OCT in PACG. Design Cross-sectional study Methods Seventy-seven eyes of 50 control subjects, 65 eyes of 45 patients with PACG, and 31 eyes of 22 PAC patients with a history of high IOP, underwent imaging with ...

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    17. Evaluation of Retinal and Choroidal Thickness By Swept-Source Optical Coherence Tomography: Repeatability and Assessment of Artifacts

      Evaluation of Retinal and Choroidal Thickness By Swept-Source Optical Coherence Tomography: Repeatability and Assessment of Artifacts

      Purpose To determine the repeatability of automated retinal and choroidal thickness measurements with swept-source optical coherence tomography (SS-OCT) and the frequency and type of scan artifacts. Design Prospective evaluation of new diagnostic technology. Methods Thirty healthy subjects were recruited prospectively and underwent imaging with a prototype SS-OCT instrument. Undilated scans of 54 eyes of 27 subjects (mean age 35.1 ± 9.3 years) were obtained. Each subject had four SS-OCT protocols repeated three times: three-dimensional (3D) 6x6-mm raster scan of the optic disc and macula, radial, and line scan. Automated measurements were obtained through segmentation software. Inter-scan repeatability was assessed ...

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    18. Assessment of Choroidal Thickness and Volume during the Water Drinking Test by Swept-Source Optical Coherence Tomography

      Assessment of Choroidal Thickness and Volume during the Water Drinking Test by Swept-Source Optical Coherence Tomography

      Objective To evaluate changes in peripapillary and macular choroidal thickness and volume after the water-drinking test (WDT) using swept-source optical coherence tomography (SS OCT). Design Prospective, cross-sectional, observational study. Participants Fifty-six eyes of 28 healthy volunteers. Methods Participants underwent a 3-dimensional optic disc and macula scanning protocol with a prototype SS OCT (Topcon, Inc., Tokyo, Japan) at baseline and 15, 30, 45, and 120 minutes after the start of the WDT. The WDT consisted of drinking 1000 ml of water within 5 minutes. Objective measurements of the choroid were obtained with automated segmentation of the choroidal boundaries. Main Outcome Measures ...

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    19. Likelihood Ratios for Glaucoma Diagnosis Using Spectral-Domain Optical Coherence Tomography

      Likelihood Ratios for Glaucoma Diagnosis Using Spectral-Domain Optical Coherence Tomography

      Purpose To present a methodology for calculating likelihood ratios for glaucoma diagnosis for continuous retinal nerve fiber layer (RNFL) thickness measurements from spectral-domain optical coherence tomography (spectral-domain OCT). Design Observational cohort study. Methods A total of 262 eyes of 187 patients with glaucoma and 190 eyes of 100 control subjects were included in the study. Subjects were recruited from the Diagnostic Innovations Glaucoma Study. Eyes with preperimetric and perimetric glaucomatous damage were included in the glaucoma group. The control group was composed of healthy eyes with normal visual fields from subjects recruited from the general population. All eyes underwent RNFL ...

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    20. Positional Independence of Optic Nerve Head and Retinal Nerve Fiber Layer Thickness Measurements With Spectral-Domain Optical Coherence Tomograph

      Positional Independence of Optic Nerve Head and Retinal Nerve Fiber Layer Thickness Measurements With Spectral-Domain Optical Coherence Tomograph

      Purpose To evaluate repeatability and positional independence of optic nerve head (ONH) and retinal nerve fiber layer (RNFL) thickness measurements in sitting and supine body positions using portable spectral-domain optical coherence tomography (iVue SD-OCT; Optovue Inc). Design Evaluation of diagnostic technology. Methods Sixty eyes of 30 subjects (10 healthy younger adults aged 20–27 years, 10 healthy older adults aged 50–66 years, and 10 glaucoma patients aged 38–82 years) were included prospectively. For each participant, all measurements were taken in a single session. After 5 minutes in the supine position, 5 scans were obtained from both eyes. Following ...

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    1-22 of 22
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    Positional Independence of Optic Nerve Head and Retinal Nerve Fiber Layer Thickness Measurements With Spectral-Domain Optical Coherence Tomograph Likelihood Ratios for Glaucoma Diagnosis Using Spectral-Domain Optical Coherence Tomography Improved visualization of deep ocular structures in glaucoma using high penetration optical coherence tomography Assessment of Choroidal Thickness and Volume during the Water Drinking Test by Swept-Source Optical Coherence Tomography Evaluation of Retinal and Choroidal Thickness By Swept-Source Optical Coherence Tomography: Repeatability and Assessment of Artifacts Optical Coherence Tomography Angiography and Glaucoma: Searching for the Missing Link Vessel density and structural measurements of optical coherence tomography in primary angle closure and primary angle closure glaucoma A comparison of the diagnostic ability of vessel density and structural measurements of optical coherence tomography in primary open angle glaucoma Relationship of Optic Nerve Structure and Function to Peripapillary Vessel Density Measurements of Optical Coherence Tomography Angiography in Glaucoma Reproducibility of Optical Coherence Tomography Angiography Macular and Optic Nerve Head Vascular Density in Glaucoma and Healthy Eyes Deep learning differentiates between healthy and diabetic mouse ears from optical coherence tomography angiography images Spectral-Domain Optical Coherence Tomography For Evaluating Palisades of Vogt in Ocular Surface Disorders With Limbal Involvement