1. Articles from Bachar Kudsieh

    1-12 of 12
    1. Dimensions of the limbus-ciliary sulcus region by optical coherence tomography and correlation study in a large population

      Dimensions of the limbus-ciliary sulcus region by optical coherence tomography and correlation study in a large population

      Purpose: To assess the dimensions of the limbus-sulcus region measured by swept-source optical coherence tomography (SS-OCT) and correlation study in a large healthy population. Setting: Centro Internacional de Oftalmología Avanzada. Design: Cross-sectional study. Methods: The dimensions of the limbus-sulcus region were measured in 625 eyes of 625 subjects in the temporal and nasal quadrants using a SS-OCT. The limbus-sulcus distance (LSD), the posterior iris line-ocular surface to limbus distance (PIOLD) and the angle to sulcus distance (ASD) were measured. These distances were then assessed for correlations with the factors age, sex, refractive error, anterior chamber angle (ACA), ciliary muscle ...

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    2. Impact of age, sex and refractive error on conjunctival and Tenon’s capsule thickness dimensions by swept-source optical coherence tomography in a large population

      Impact of age, sex and refractive error on conjunctival and Tenon’s capsule thickness dimensions by swept-source optical coherence tomography in a large population

      Purpose To evaluate conjunctival and Tenon’s capsule thickness (CTT) in a large healthy population using swept-source optical coherence tomography (SS-OCT), investigating the impact of age, sex and refractive error. Methods 630 healthy participants underwent a complete ophthalmological examination. CTT was manually measured in the temporal and nasal quadrants at 0, 1, 2 and 3 mm from the scleral spur using SS-OCT (CTT0, CTT1, CTT2 and CTT3, respectively). These dimensions were then assessed for associations in a multivariate regression model with age, sex, refractive error and anterior scleral thickness (AST). The reproducibility of the CTT measurements was determined in 30 ...

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    3. Anterior scleral thickness dimensions by swept-source optical coherence tomography

      Anterior scleral thickness dimensions by swept-source optical coherence tomography

      Clinical relevance : Given the association of scleral characteristics with many ophthalmological diseases, there is an important need to measure the anterior scleral thickness (AST). Background : This study examined the AST by swept-source optical coherence tomography (SS-OCT) in a large healthy population, assessing also the reproducibility of AST measurements and the correlation with different parameters. Methods : Cross-sectional study in 605 eyes of 605 subjects. AST measurements were made in the temporal and nasal quadrants at 1 (AST1) and 3 mm (AST3) from the scleral spur using SS-OCT. These dimensions were then assessed for associations in a multivariate model with the factors ...

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    4. Updates on the utility of anterior segment optical coherence tomography in the assessment of filtration blebs after glaucoma surgery

      Updates on the utility of anterior segment optical coherence tomography in the assessment of filtration blebs after glaucoma surgery

      The formation of filtration blebs is the main drainage mechanism for reducing intraocular pressure after traditional incisional glaucoma surgery such as trabeculectomy and non-penetrating deep sclerotomy. Early and short-lasting blebs may also occur after canaloplasty. Bleb formation also plays an important role after the implantation of glaucoma drainage devices, including Minimally Invasive Glaucoma Surgery devices. Anterior segment optical coherence tomography (AS-OCT) is a rapid and non-invasive high-resolution imaging technique that has evolved in recent years to become a routine examination. Anterior segment optical coherence tomography (AS-OCT) provides key information in the assessment and follow-up of glaucoma surgery, especially in the ...

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    5. Microvascular alterations in children with optic disk drusen evaluated by optical coherence tomography angiography

      Microvascular alterations in children with optic disk drusen evaluated by optical coherence tomography angiography

      Purpose To asses changes in vessel density (VD) in children with optic disk drusen (ODD) using swept source optical coherence tomography angiography (OCTA). Methods Cross-sectional study of 27 eyes with ODD compared with age-matched controls. Peripapillary and macular VD were measured in the superficial retinal capillary plexus (SCP), deep capillary plexus (DCP), and choriocapillaris (CC). The correlation between VD changes with alterations in retinal nerve fiber layer (RNFL), ganglion cell layer (GCL), and visual field (VF) was analyzed. Results Mean participant age was 12.5 ± 3.3 years (range, 7–18 years); 63% was females. In the patients vs. controls ...

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    6. Ciliary muscle dimensions measured by swept-source optical coherence tomography in eyes with primary open-angle glaucoma and healthy eyes

      Ciliary muscle dimensions measured by swept-source optical coherence tomography in eyes with primary open-angle glaucoma and healthy eyes

      Purpose To compare in vivo swept-source optical coherence tomography (SS-OCT) measurements of the ciliary muscle (CM) in patients with primary open-angle glaucoma (POAG) and healthy subjects, and examine correlations between CM dimensions and several covariates. Methods This was a cross-sectional study of the right eyes of 181 subjects: 89 POAG patients and 92 healthy subjects. Using the Triton SS-OCT device (Topcon, Tokyo, Japan), CM length (CML), area (CMA) and thickness measured 1000 µm (CMT1), 2000 µm (CMT2) and 3000 µm (CMT3) from the scleral spur were determined in the temporal and nasal quadrants. POAG patients were subjected to visual field ...

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    7. Normative database of peripapillary vessel density measured by optical coherence tomography angiography and correlation study

      Normative database of peripapillary vessel density measured by optical coherence tomography angiography and correlation study

      Purpose: To provide a normative data set of swept-source optical coherence tomography angiography (SS-OCTA) peripapillary vessel density (VD) measurements and assess correlations with age, gender, disc area and axial length (AL). Material and Methods: This was an observational cross-sectional study conducted on 346 right eyes of healthy subjects. Peripapillary SS-OCTA VD measurements were obtained in the retinal superficial capillary plexus (SCP), deep capillary plexus (DCP), and choriocapillaris (CC) in all four quadrants using the Triton device (Topcon, Nagoya, Japan). AL measurements were made by optical biometry. Results: Mean participant age was 37.7 ±19.8 years (range 5 – 83), AL ...

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    8. Reproducibility of macular and optic nerve head vessel density measurements by swept-source optical coherence tomography angiography

      Reproducibility of macular and optic nerve head vessel density measurements by swept-source optical coherence tomography angiography

      Purpose: To assess the reproducibility of swept-source optical coherence tomography angiography (SS-OCTA) for macular and optic nerve head (ONH) vessel density (VD). Methods: Cross-sectional study using the Triton OCTA (Topcon, Tokyo, Japan), for VD (%) measurements in 40 eyes of 40 healthy subjects on two 6 × 6 mm scans of the macula and ONH across five subfields (central, superior, inferior, temporal, and nasal) at different segmentation levels: superficial capillary plexus (SCP), deep capillary plexus (DCP), outer retina, and choriocapillaris. Reproducibility values were summarized as intraclass correlation coefficients (ICCs) and coefficients of variations (CV). Results: ICCs for the macular VD measurements in ...

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    9. Schlemm's canal measured by optical coherence tomography and correlation study in a healthy Caucasian child population

      Schlemm's canal measured by optical coherence tomography and correlation study in a healthy Caucasian child population

      Purpose To measure the Schlemm's canal (SC) in vivo by Fourier‐domain optical coherence tomography (FD‐OCT) in a Caucasian paediatric population. Methods Participants of this cross‐sectional study were 290 healthy children. In the right eye of each child, SC cross‐sectional diameter and area measurements were made with the FD‐OCT instrument RTVue ® (Optovue Inc, Fremont, CA, USA) in the nasal and temporal quadrants. These SC variables were then assessed for correlation with the factors age, gender, refractive error, anterior chamber angle and trabecular meshwork (TM) metrics. Finally, the reproducibility of the SC measurements was assessed in ...

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      Mentions: Visionix
    10. Anterior Chamber Angle Tissue as an Incidental Optical Coherence Tomography Finding in a Large Healthy Caucasian Child Population

      Anterior Chamber Angle Tissue as an Incidental Optical Coherence Tomography Finding in a Large Healthy Caucasian Child Population

      Purpose: The aim of this study was to describe the presence of anterior chamber angle (ACA) tissue as an incidental optical coherence tomography (OCT) finding in healthy children. Methods: For this cross-sectional study, we reviewed Fourier-domain OCT images obtained in 422 children, who were chosen as candidates for inclusion in a prior study, and who visited our clinic for a routine vision test. The presence of angle tissue was assessed in the nasal and temporal quadrants. On tomographies showing angle tissue , several measurements were made, including ACA width and trabecular meshwork length and size. Results: Hyperreflective tissue was observed in ...

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    1-12 of 12
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    Anterior Chamber Angle Tissue as an Incidental Optical Coherence Tomography Finding in a Large Healthy Caucasian Child Population Schlemm's canal measured by optical coherence tomography and correlation study in a healthy Caucasian child population Reproducibility of macular and optic nerve head vessel density measurements by swept-source optical coherence tomography angiography Normative database of peripapillary vessel density measured by optical coherence tomography angiography and correlation study Ciliary muscle dimensions measured by swept-source optical coherence tomography in eyes with primary open-angle glaucoma and healthy eyes Microvascular alterations in children with optic disk drusen evaluated by optical coherence tomography angiography Updates on the utility of anterior segment optical coherence tomography in the assessment of filtration blebs after glaucoma surgery Prevalence of a visible supraciliary space by swept-source optical coherence tomography in a large healthy population Impact of age, sex and refractive error on conjunctival and Tenon’s capsule thickness dimensions by swept-source optical coherence tomography in a large population Dimensions of the limbus-ciliary sulcus region by optical coherence tomography and correlation study in a large population The truth about invisible posterior vitreous structures Increased Macrophage-like Cell Density in Retinal Vein Occlusion as Characterized by en Face Optical Coherence Tomography