The Effect of Pathological Retinal Changes on Retinal Capillary Circulation in Myopic Patients.

Objectives: Myopia is a common ocular disorder worldwide, leading to degenerative changes in the retina which is highly susceptible to vascular impairment. The aim of the study was to investigate the effects of pathological retinal changes on the retinal capillary structures using optical coherence tomography angiography (OCTA) in myopic patients.

Methods: Thirty-two patients with high myopia (HM), 29 patients with pathological myopia (PM), and 38 healthy subjects with emmetropia (EM) were enrolled in this study.

Local ocular surface findings in COVID-19 patients without ocular symptoms.

Purpose: To investigate subjective ocular symptoms and objectively measure tear secretion in patients with a confirmed diagnosis of coronavirus disease-2019 (COVID-19).

Methods: In this prospective cross-sectional study, 24 patients who had survived COVID-19 infection and 27 healthy controls were enrolled. Conjunctival impression cytology, the Schirmer test, tear-film break-up time, corneal staining scores were applied to all the participants.

Comparison of radial peripapillary capillary density results of individuals with and without Helicobacter pylori infection.

Purpose: To evaluate the radial peripapillary capillary density using optical coherence tomography angiography in patients with and without Helicobacter pylori infection.

Methods: This prospective, cross-sectional study comprised 52 patients (52 eyes: Group 1) and 38 patients (38 eyes: Group 2) with and without H. pylori infections, respectively.

Evaluation of the radial peripapillary capillary density in unilateral branch retinal vein occlusion and the unaffected fellow eyes.

Background: Given that unilateral branch retinal vein occlusion (BRVO) and glaucoma share common systemic vascular risk factors, the fellow eyes of patients with BRVO may be at increased risk of glaucoma.

Objectives: To analyze the radial peripapillary capillary density (RPCD) in eyes with unilateral BRVO and their unaffected fellow eyes using optical coherence tomography angiography (OCTA).

Design: Cross-sectional, prospective study.

Evaluation of Corneal and Lenticular Parameters in Iron Deficiency Anemia.

Objectives: The aim of this study was to investigate the effects of iron deficiency anemia on corneal and lenticular densitometry.

Methods: Thirty-two patients with iron deficiency anemia and 38 healthy participants were enrolled. The Pentacam HR imaging system (Oculus Optikgeräte GmbH, Wetzlar, Germany) was used to record keratometry, corneal densitometry (12-mm corneal diameter), lens densitometry measurements.

Objective Assessment of Corneal and Lens Clarity in Patients with COVID-19.

Significance: The severe acute respiratory syndrome coronavirus 2 virus, which causes the coronavirus disease 2019 (COVID-19) pandemic, can bind to epithelial cells in the human cornea and conjunctiva, which may result in changes of corneal and lenticular densitometry.

Purpose: We aimed to report the corneal and lenticular clarity of patients who had been diagnosed previously with confirmed infection of COVID-19.

Methods: This was a prospective, cross-sectional study.

The Impact of Coronavirus Disease 2019 (COVID-19) on Retinal Microcirculation in Human Subjects.

Background: The aim of the study was to assess retinal microcirculation in patients with coronavirus disease 2019 (COVID-19) through the use of optical coherence tomography angiography (OCT-A) and compare the results with those obtained in healthy controls.

Methods: The study enrolled 39 patients who had fully recovered from COVID-19 and 40 healthy controls. OCT-A image acquisitions were obtained using AngioVue software (version 2017.

Comparison of optical coherence tomography angiography features in type 1 versus type 2 choroidal neovascular membranes secondary to age-related macular degeneration.

Background: Optical coherence tomography angiography (OCTA) is an advanced imaging modality that provides high resolution images at the level of different retinal layers. This study aime to evaluate choroidal neovascular membranes (CNVMs) secondary to age-related macular degeneration (AMD) quantitatively and qualitatively, according to their classification, morphological features, and flow areas, using OCTA.

Methods: In this descriptive, comparative, cross-sectional study, CNVMs were divided into 2 groups according to their classification as type 1 or type 2 neovascularization.

Retinal vascular findings in patients with COVID-19.

Purpose: The purpose of this study was to compare the retinal vascular caliber of COVID-19 patients with that of healthy subjects.

Methods: This was a prospective case-control study. Forty-six patients who had COVID-19 were successfully treated, and 38 age- and gender-matched healthy subjects were enrolled in this study.

Quantitative assessment of retinal changes in COVID-19 patients.

Clinical Relevance: The SARS-COV 2 virus, which is responsible for the COVID-19 pandemic, acts on the angiotensin converting enzyme 2 (ACE-2) receptor in the host cell. Ocular effects may occur because of the ACE-2 receptor in the retina.

Background: To investigate the impact of COVID-19 on the retinal layers and optic disc parameters in previously confirmed COVID-19 patients using spectral domain optical coherence tomography (SD-OCT).

Bilateral retinal toxicity as a result of poisoning with pure iodine.

Iodine is an essential mineral that is necessary for the synthesis of thyroid hormones, which can cause many diseases in the body. The application of adding potassium iodate to table salts started in Turkey in 1998. High doses of iodate cause retinal toxicity, leading to significant vision loss.

Retinal Microcirculation Alterations in Microalbuminuric Diabetic Patients With and Without Retinopathy.

Purpose: To investigate the effect of microalbuminuria (MA) on superficial vessel density (SVD), deep vessel density (DVD), and choriocapillaris vessel density (CVD) in type-2 diabetic patients.

Methods: Twenty patients without diabetic retinopathy (DR) and MA (group 1), 20 patients without DR but with MA (group 2) and 30 patients with mild DR and MA (group 3) were enrolled in this prospective and cross-sectional study. SVD, DVD, and CVD of all patients were screened with optical coherence tomography angiography (OCTA).

Normative Data Assessment of Peripapillary and Macular Vessel Density and Foveal Avascular Zone Metrics Using Optical Coherence Tomography Angiography in Children.

Purpose: To quantify the vessel density of the macula and optic disc and foveal avascular zone (FAZ) in healthy children and to evaluate the effects of age, gender, axial length, body mass index (BMI), and refractive errors on vessel density and FAZ.

Methods: This study enrolled 92 eyes of 92 participants (42 boys and 50 girls). Optical coherence tomography angiography (OCTA) was performed using AngioVue (Avanti; Optivue).

Evaluation of radial peripapillary capillary density in patients with newly diagnosed iron deficiency anemia.

Purpose: To investigate the effects of iron deficiency anemia (IDA) on radial peripapillary capillary vessel density (RPCvd) and retinal nerve fiber layer (RNFL) thickness.

Methods: Forty patients with IDA, and 46 healthy participants, were enrolled in this study. Optical coherence tomography angiography was used to determine RNFL thickness and RPCvd measurements.

Densitometric analysis of cornea in patients with neovascular age-related macular degeneration after intravitreal aflibercept loading dose.

Purpose: To evaluate the anatomic changes in the cornea and anterior segment following intravitreal aflibercept loading dose for neovascular age-related macular degeneration.

Methods: The study included 40 eyes of 40 patients with neovascular age-related macular degeneration. Each patient underwent a loading dose of one injection per month for three consecutive doses of aflibercept (0.

Direct and crossover effects of Phenylephrine and Cyclopentolate on foveal avascular zone and vessel density of macular capillary plexuses: an optical coherence tomography angiography study.

To determine the influence of phenylephrine and cyclopentolate on foveal avascular zone (FAZ) and vessel density of macular capillary plexus measurements via optical coherence tomography angiography (OCTA). The participants were separated into 2 groups according to the administration of drops. One drop of phenylephrine 2.

Quantitative analysis of radial peripapillary capillary plexuses in patients with clinically unilateral pseudoexfoliation syndrome.

Purpose: The aim of this study was to image the radial peripapillary capillary vessel densities (RPCvds) of the affected eyes and fellow unaffected eyes of individuals with unilateral pseudoexfoliation syndrome (PES) using optical coherence tomography angiography (OCTA) and to compare the RPCvds with those of normal age-matched individuals.

Methods: The eyes were divided into three groups: the pseudoexfoliative material (PXM)-positive eyes of patients with clinically unilateral PES (study eyes), the fellow eyes of the PXM-positive patients (fellow eyes), and the eyes of healthy patients (control eyes). Those patients with glaucomatous findings, including peripapillary hemorrhaging, cupping, notching, focal thinning of the neuroretinal rim, or intraocular pressure readings greater than 21 mmHg, were excluded from the study.

Early and Late Switch from Ranibizumab to an Intravitreal Dexamethasone Implant in Patients with Diabetic Macular Edema in the Event of a Poor Anatomical Response.

Background And Objective: Patients with diabetic macular edema may not have optimal outcomes even with monthly ranibizumab intravitreal injections. A corticosteroid implant might be considered in such patients. The objective of this study was to compare the outcomes of switching from ranibizumab to an intravitreal dexamethasone implant after three or six consecutive monthly injections of ranibizumab.

Evaluation of radial peripapillary capillary density in patients with Fuchs uveitis syndrome.

Purpose: To quantitatively analyze the microcirculation in the peripapillary sectors in the affected eyes and fellow unaffected eyes of individuals with unilateral Fuchs uveitis syndrome (FUS) using optical coherence tomography angiography (OCTA), and to compare the radial peripapillary capillary vessel density (RPCvd) with normal and age-matched individuals.

Methods: Eyes were divided into three groups based on the involvement of the FUS: FUS-positive eye of patients (study eye), fellow eye of FUS-positive patients (fellow eye), and the control eye for the control group (control eye). RPCvd (%) and peripapillary retinal nerve fiber layer (RNFL) thickness (μm) at eight equal sectors and two equal hemispheres were automatically calculated in peripapillary region via OCTA.

Corneal Endothelial Morphology and Thickness Changes in Patients with Gout.

Objectives: To investigate corneal endothelial cell density (ECD), morphology, and central corneal thickness (CCT) in patients with gout compared with healthy subjects.

Materials And Methods: Fifty eyes of 50 gout patients and 50 eyes of 50 healthy subjects without gout or any other systemic disease were included in this study. After detailed ophthalmologic examination, specular microscopy (Tomey EM-4000; Tomey Corp) measurement was performed for all participants.

Multimodal imaging of type 1 aneurysmal telangiectasia in a Turkish female with giant arteriovenous aneurysmal malformation.

We present a case with giant arteriovenous aneurysmal malformation with different imaging modalities, including fundus photography, fundus fluorescein angiography, spectral domain optical coherence tomography, and optical coherence tomography angiography. A 43-year-old Turkish female presented with gradual blurred vision in her left eye. Her best-corrected visual acuity was 20/200.

Cataract in diabetes mellitus.

Diabetes mellitus (DM) is a chronic systemic disease that has increases in prevalence over time. DM can affect all ocular structures, with cataract being the most common ocular complication. Cataract is the leading cause of blindness worldwide.

Increased Corneal Ectasia Risk in Patients with Familial Mediterranean Fever.

Purpose: To evaluate the corneal tomographic parameters in patients with familial Mediterranean fever (FMF) and to compare data with those of healthy control subjects.

Materials And Methods: Forty eyes of 40 patients with FMF (FMF group) and 35 eyes of 35 healthy subjects (control group) were included to this prospective study. All participants underwent complete ophthalmological examination and tomographic analysis with Pentacam HR.