Factors Affecting the Results of Ahmed Glaucoma Valve Implantation in Diabetic Neovascular Glaucoma With or Without Previous Pars Plana Vitrectomy.

Objectives: The aim of this study was to compare the outcomes of Ahmed glaucoma valve implantation (AGVI) in neovascular glaucoma (NVG) due to proliferative diabetic retinopathy (PDR) with or without a pars plana vitrectomy (PPV) history and to analyze the factors affecting surgical failure.

Methods: Patients with NVG secondary to PDR undergoing AGVI at a single center were reviewed retrospectively. The surgical failure rates and post-operative complications were compared between eyes with (PPV-AGVI group) and without previous PPV (AGVI group).

Decreased peri-parafoveal RPE, EZ and ELM intensity: A novel predictive biomarker for hydroxychloroquine retinal toxicity.

Purpose: To evaluate the reflectivities of the retinal pigment epithelium (RPE), ellipsoid zone (EZ), and external limiting membrane (ELM) in the central fovea, perifoveal, and parafoveal regions with Optical Coherence Tomography (OCT) and the change in choroid vascular index (CVI) in patients using hydroxychloroquine (HCQ).

Methods: Sixty-one patients underwent HCQ treatment; age and sex-matched 44 control group subjects were included in the study. The RPE, EZ, and ELM reflectivities were measured with the ImageJ program at 5 points, and CVI was calculated.

The effect of uneventful cataract surgery on Schlemm's canal and the trabecular meshwork in cases with pseudoexfoliation.

Purpose: To evaluate the effect of uneventful cataract surgery on Schlemm's canal (SC) and the trabecular meshwork (TM) in cases with pseudoexfoliation (PX).

Methods: In this prospective study, 37 PX and 37 normal eyes, who underwent cataract surgery, were included. The PX group was further divided into two subgroups: PX syndrome (PXS) and PX glaucoma (PXG).

Comparison of the Effects of Phacoemulsıfıcatıon and Dexamethasone Implantation in the Same Session with Other Phakic Conditions.

Objectives: The objective of the study is to evaluate anatomical and functional results such as best corrected visual acuity (BCVA), central macular thickness (CMT), and intraocular pressure (IOP) in patients who received intravitreal dexamethasone (DEX) implant for diabetic macular edema (DME), and to compare the efficacy according to patients' lens status and concurrent phacoemulsification surgery.

Methods: A total of 70 eyes of 55 patients with DME who received intravitreal DEX implantation were included in this retrospective study. Patients who received intravitreal DEX implantation were divided into three groups phaco-DEX (group 1), pseudophakic (group 2), and phakic (group 3).

Evaluation of Schlemm Canal Parameters Using Swept-Source Optical Coherence Tomography in Eyes That Underwent Keratoplasty.

Objectives: In this study, we aimed to evaluate Schlemm canal parameters using anterior segment swept-source optical coherence tomography in eyes that underwent keratoplasty and compare them with keratoconus and healthy control groups.

Methods: The study included 32 patients who underwent penetrating keratoplasty or deep anterior lamellar keratoplasty once due to keratoconus and age-matched and sex-matched 20 keratoconus patients and 30 healthy controls. In all the patients, a single horizontal image centered on the central cornea was obtained from the nasal and temporal quadrants with low-intensity scanning to visualize Schlemm canal.

Quantification of retinal vein and artery trajectories using second-order polynomial equation in eyes with vitreomacular traction.

Backgrounds: To measure the degree of curvature of the retinal artery trajectory (RAT) and retinal vein trajectory (RVT) in the eyes of patients with vitreomacular traction (VMT) and compare them with their healthy fellow eyes.

Methods: This was a retrospective, cross-sectional, case-control study of 58 eyes of 29 patients with unilateral VMT. The participants were divided into two groups.

Factors defining the intraocular pressure-lowering effect of phacoemulsification and laser peripheral iridotomy in patients with primary angle closure : Factors defining IOP lowering effect of PE and LPI in PAC.

To identify whether gonioscopic ciliary body visibility and factors including anterior chamber depth (ACD), axial length (AL), acute attack history, and preoperative intraocular pressure (IOP) had any effect on IOP decrease in primary angle closure (PAC) and primary angle-closure glaucoma (PACG) after phacoemulsification (PE) and/or laser peripheral iridotomy (LPI). This retrospective-design study was conducted with 81 eyes with PAC and PACG; 33 eyes whose IOP was controlled with LPI and PE constituted group 1, and 48 eyes whose IOP was controlled using LPI alone comprised group 2. The effects on preoperative and last-visit IOP levels, ciliary body visibility, ACD, AL, and acute attacks were analyzed.

Assessment of Tear Meniscus Dimensions Using Anterior Segment Optical Coherence Tomography in Vitamin D Deficiency in a Pediatric Population.

Background: To investigate of the effect of vitamin D (Vit-D) deficiency on the tear film in children and compare it with that of healthy subjects.

Methods: This prospective and cross-sectional study comprised 75 eyes of children who had Vit-D deficiency (Group 1) and 85 eyes of age- and gender-matched healthy children (Group 2). The tear-film break-up time (TF-BUT) and Schirmer test values, as well as the Ocular Surface Disease Index (OSDI) scores, were recorded for the participants in all groups.

Comparison of Intraocular Tamponade in Patients with Peripheral Tear-Induced Retinal Detachment and Coexisting Macular Hole without High Myopia.

Introduction: To introduce the surgical results and examine the effect of intraocular tamponades on surgical outcomes in patients with coexisting macular hole (MH) and rhegmatogenous retinal detachment (RRD) without high myopia.

Methods: This retrospective, cross-sectional, two-center study was carried out with 29 eyes of 29 patients. The patients were divided into two groups according to the intraocular tamponade used in surgery: silicone oil (Group 1) and CF gas (Group 2).

Oct biomarkers of treatment-naive diabetic macular edema in patients with non-proliferative and proliferative diabetic retinopathy.

Purpose: To evaluate and compare the retinal and choroidal spectral-domain optic coherence tomography (SD-OCT) findings of treatment-naïve diabetic macular edema (DME) secondary to non-proliferative and proliferative diabetic retinopathy (NPDR-PDR).

Material And Methods: A hundred and thirty-eight eyes of 138 patients with DME were evaluated. Best-corrected visual acuity was recorded, biomicroscopic anterior and posterior segment examination, SD-OCT imaging, and fundus fluorescein angiography (FFA) were performed.

The Importance of Anatomic Configuration and Cystic Changes in Macular Hole: Predicting Surgical Success with a Different Approach.

Purpose: This study aimed to define a novel metric for the area of the macular hole (MH) and cysts located around the hole using an optical coherence tomography (OCT) device.

Methods: This study was conducted with 58 eyes of 56 patients. The patients were divided into two groups according to anatomic closure after surgery.

Assessment of the Quality and Reliability of YouTube Videos on Fuchs Endothelial Corneal Dystrophy.

Objectives: The aim of the study was to assess the quality and reliability of videos on Fuchs endothelial corneal dystrophy (FECD) on YouTube.

Methods: A search of YouTube was performed for the term "FECD" without any changes to the website's standard search preferences. The first 100 videos were recorded.

Effect of Diabetes Mellitus and Systemic Hypertension on Macular Hole Surgery.

Objective: To evaluate the anatomical and functional results of macular hole surgery in patients with diabetes mellitus (DM) and hypertension (HT) without retinopathy.

Study Design: Descriptive comparative study.

Place And Duration Of Study: Department of Ophthalmology, Health Sciences University Haydarpaşa Numune Training and Research Hospital, Turkey between January 2016 and December 2020.

Effect of bariatric surgery on macular and peripapillary choroidal structures in young patients with morbid obesity.

Objective: To examine the effect of bariatric surgery on the macular and peripapillary choroid in the late postoperative period in young patients with morbid obesity and compare them with a healthy control group.

Methods: This prospective controlled study included 50 eyes of 25 young patients with morbid obesity and 50 eyes of 25 age and sex-matched healthy controls. Sleeve gastrectomy was performed on all patients with obesity.

The Effect of Fluorosecein on Corneal Endothelial Structure and Morphology in Diabetic Retinopathy Patients undergone Fundus Fluoresecein Angiography.

Objectives: To evaluate fluorescein effect on the corneal endothelium by endothelial specular microscopy in diabetic retinopathy patients undergone fundus fluoresecein anjiography (FFA).

Methods: One hundred thirthy four diabetic retinopathy patients undergone FFA aged between 42 and 74 years were included study. We checked the corneal endothelial cell density (ECD), coefficient of variation of cell area (CV/polymegethism) and percentage of hexagonal cells (6A/pleomorphysm) before FFA and 1 hour, 1 day, 1 week after the procedure.

Evaluation of Pupillometric Parameters in Patients with COVID-19.

Purpose: To investigate the pupillary diameter and pupillary light response in patients who have recovered from the COVID-19.

Methods: Thirty two eyes of 32 patients with a history of COVID-19 in the last two months and 32 eyes of 32 age and sex-matched healthy controls were included in this prospective study. All patients had neurological symptoms.